Add @user0’s contributions as of 2023-10-30

Features:
 * Hide minimize/maximize/close buttons (MR 39)
 * autoconfig: set media.webrtc.camera.allow-pipewire (MR 38)
 
 Other:
 * README: update supported versions
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Merge tag '4.2.0' into librem5-mirror

Release 4.2.0

Features:
* Hide minimize/maximize/close buttons (MR 39)
* autoconfig: set media.webrtc.camera.allow-pipewire (MR 38)

Other:
* README: update supported versions

README.md

@@ -1,17 +1,28 @@
-# mobile-config-firefox
+# Mobile-Friendly Firefox Customizations for Librem 5 (mirror)
 
-Mobile and privacy friendly configuration for Firefox >= 91.
+Mobile and privacy friendly configuration for current standard and extended
+support releases of Firefox.
 
-This does not replace a proper implementation in
+This **read-only mirror** is tracking all changes posted by `@user0` in the thread [Mobile-Friendly Firefox Customizations for Librem 5](https://forums.puri.sm/t/20313) on Purism’s forums.
+
+This repository is maintained by Claudia Pellegrino (`@claui`).
+
+As a read-only mirror, it’s not accepting pull requests. The code in this
+repository also does not replace a proper implementation in
 [Firefox upstream](https://bugzilla.mozilla.org/show_bug.cgi?id=1579348)
 *(interesting stuff happens in issues linked in "References")*.
 
+---
+
+**Note:** Below follows a copy of the original `README.md` file from the upstream project [postmarketOS/mobile-config-firefox](https://gitlab.com/postmarketOS/mobile-config-firefox/).
+
+---
+
 ## What this config does
 
 * Adapt UI elements and "about:" pages to small screen sizes (when opened on
   small screen)
 * Enable mobile gestures
-* User agent set to same as Tor Browser for Android
 * Privacy tweaks:
   * Disable search suggestions
   * Disable Firefox studies
@@ -98,10 +109,10 @@ changes are applied.
 
 The `src/mobile-config-autoconfig.js` script generates `userChrome.css` and
 `userContent.css` while Firefox starts. It logs to your Firefox profile
-directory, find the log file with:
+directory, follow the log file with:
 
 ```
-$ find ~/.mozilla -name mobile-config-firefox.log
+$ tail -F $(find ~/.mozilla -name mobile-config-firefox.log)
 ```
 
 ## Coding guidelines

src/mobile-config-autoconfig.js

@@ -18,7 +18,7 @@
 // https://web.archive.org/web/20201018211550/https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Code_snippets/File_I_O
 
 const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
-Cu.import("resource://gre/modules/Services.jsm");
+const Services = globalThis.Services || Cu.import("resource://gre/modules/Services.jsm").Services; // for compatibility with FF < 104
 Cu.import("resource://gre/modules/FileUtils.jsm");
 
 var g_ff_version;
@@ -71,12 +71,7 @@ function log_obj(obj) {
 }
 
 function get_firefox_version() {
-    try {
+    return Services.appinfo.version.split(".")[0];
-        return Services.appinfo.lastAppVersion.split(".")[0];
-    } catch(e) {
-        log("Couldn't get Firefox version (expected on first start): " + e);
-        return 0;
-    }
 }
 
 function get_firefox_version_previous() {
@@ -250,10 +245,7 @@ function css_files_update() {
         var file = css_file_get(name);
 
         if (file.exists()) {
-            /* During the very first start, ff_previous is first "unknown",
+            if (g_ff_version != ff_previous) {
-             * then the files get installed and Firefox gets restarted.
-             * Then ff_previous is 0. Don't restart it again. */
-            if (ff_previous != 0 && g_ff_version != ff_previous) {
                 log("Removing outdated file: " + file.path + " (Firefox" +
                     " version changed)");
                 file.remove(false);
@@ -271,10 +263,30 @@ function css_files_update() {
         set_firefox_version_previous(g_ff_version);
 }
 
+/**
+ * Builds a user-agent as similar to the default as possible, but with "Mobile"
+ * inserted into the platforms section.
+ *
+ * @returns {string}
+ */
+function build_user_agent() {
+    var appinfo = Services.appinfo;
+    var vendor = appinfo.vendor || "Mozilla";
+    var os = appinfo.OS || "Linux";
+    var version = get_firefox_version() + ".0";
+    var name = appinfo.name || "Firefox";
+    var arch = (appinfo.XPCOMABI && appinfo.XPCOMABI.includes("-"))
+        ? appinfo.XPCOMABI.split("-")[0]
+        : "aarch64";
+
+    return `${vendor}/5.0 (X11; ${os} ${arch}; Mobile; rv:${version}) Gecko/20100101 ${name}/${version}`;
+}
+
 function set_default_prefs() {
     log("Setting default preferences");
-    // Select a mobile user agent for firefox (same as tor browser on android)
+
-    defaultPref('general.useragent.override', 'Mozilla/5.0 (Android 10; Mobile; rv:110.0) Gecko/110.0 Firefox/110.0');
+    var user_agent = build_user_agent();
+    defaultPref('general.useragent.override', user_agent);
 
     // Do not suggest facebook, ebay, reddit etc. in the urlbar. Same as
     // Settings -> Privacy & Security -> Address Bar -> Shortcuts. As
@@ -297,6 +309,12 @@ function set_default_prefs() {
     // shows recently closed tabs. The always pinned tab takes up screen estate
     // and it's slightly annoying if you do not want to register an account.
     defaultPref('browser.tabs.firefox-view', false);
+
+    // FF >= 116 allows to use cameras via Pipewire. While it will likely still
+    // take a while until this is made the default, on most mobile devices it
+    // makes a lot of sense to enable it unconditionally, as cameras usually
+    // only work with libcamera, not via plain v4l2.
+    defaultPref('media.webrtc.camera.allow-pipewire', true);
 }
 
 function main() {

src/userChrome/alt-browser-alt.css

@@ -0,0 +1,78 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --alltabs-button-position: 3.5px !important;
+        --widget-overflow-margin: 22px;
+        --unified-extensions-panel-margin: 22px;
+        --customizationui-widget-panel-margin: 22px;
+        --appMenu-popup-margin: 22px;
+        --BMB_bookmarksPopup-margin: 22px;
+    }
+    :root[uidensity="touch"] {
+        --alltabs-button-position: 4.5px !important;
+        --widget-overflow-margin: 23px;
+        --unified-extensions-panel-margin: 23px;
+        --customizationui-widget-panel-margin: 23px;
+        --appMenu-popup-margin: 23px;
+        --BMB_bookmarksPopup-margin: 23px;
+    }
+    :root:not([uidensity="touch"],[inFullscreen]) {
+        --uc-bottom-toolbar-height: calc(39px + var(--toolbarbutton-outer-padding) )
+    }
+    :root[uidensity="touch"]:not([inFullscreen]){
+        --uc-bottom-toolbar-height: calc(43px + var(--toolbarbutton-outer-padding) )
+    }
+
+    /* Hide Nav Bar and Tab Bar when in Fullscreen mode and hide and Title Bar */
+    #nav-bar[inFullscreen],
+    #TabsToolbar[inFullscreen],
+    .titlebar-buttonbox-container {
+        display: none;
+    }
+
+    /* Move Nav Bar to bottom */
+    #browser,
+    #customization-container {
+        margin-bottom: var(--uc-bottom-toolbar-height,0px)
+    }
+    #nav-bar{
+        position: fixed !important;
+        bottom: 0px;
+        width: 100%;
+        z-index: 1;
+    }
+    .panel-viewstack {
+        max-height: unset !important;
+    }
+
+    /* Adjust Widget Overflow Menu (») spawn height */
+    #widget-overflow {
+        margin-bottom: var(--widget-overflow-margin) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: var(--unified-extensions-panel-margin) !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: var(--customizationui-widget-panel-margin) !important;
+    }
+
+    /* Adjust Main App Menu (≡) spawn height */
+    #appMenu-popup {
+        margin-bottom: var(--appMenu-popup-margin) !important;
+    }
+
+    /* Adjust Bookmarks Menu (★) spawn height */
+    #BMB_bookmarksPopup {
+        margin-bottom: var(--BMB_bookmarksPopup-margin) !important;
+    }
+
+}

src/userChrome/alt-single_tab_mode-alt.css

@@ -0,0 +1,98 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 3.5px;
+        --alltabs-number-position: calc(var(--toolbarbutton-inner-padding) * 1.5 );
+        --urlbar-width: calc(100vw - 166px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 4.5px;
+        --alltabs-number-position: calc(var(--toolbarbutton-inner-padding) * 1.5 );
+        --urlbar-width: calc(100vw - 171.5px);
+    }
+
+    /* Hide Nav Bar and Tab Bar when in Fullscreen mode and hide Title Bar, Newtab button, and New-tab button */
+    #nav-bar[inFullscreen],
+    #TabsToolbar[inFullscreen],
+    .titlebar-buttonbox-container,
+    #new-tab-button,
+    #tabs-newtab-button {
+        display: none !important;
+    }
+
+    /* Hide unpinned inactive tabs */
+    .tabbrowser-tab:not([pinned]):not([selected]) {
+        visibility: collapse !important;
+        min-width: 0 !important;
+    }
+
+    /* Expand unpinned active tab */
+    #tabbrowser-tabs:not([haspinnedtabs]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab[selected] {
+        min-width: 100vw !important;
+    }
+    #tabbrowser-tabs[haspinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab:not([pinned])[selected] {
+        min-width: calc(100vw - 40px) !important;
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+}

src/userChrome/appMenu.css

@@ -7,13 +7,20 @@
      * height. This is due to the position="bottomcenter topright" attribute in
      * the HTML, which we can't override via CSS. */
     #appMenu-popup {
-        margin-top: -390px !important;
+        /*margin-top: -390px !important;*/
-        height: 310px;
+        /*height: 310px;*/
-        max-height: 310px;
+        /*max-height: 310px;*/
+        height: 340px;
+        max-height: 340px;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
     }
     #appMenu-protonMainView vbox.panel-subview-body {
-        height: 300px !important;
+        /*height: 300px !important;*/
-        max-height: 300px !important;
+        /*max-height: 300px !important;*/
+        height: 318px !important;
+        max-height: 318px !important;
+        margin-top: 4px !important;
     }
     #appMenu-multiView box.panel-viewstack:first-child {
         /* Use the whole space in the menu, instead of slowly increasing the
@@ -42,16 +49,16 @@
      *   are over the FF in fullscreen) */
     #appMenu-fxa-status2, /* FF login */
     #appMenu-fxa-separator, /* FF login */
-    #appMenu-new-window-button2,
+    /*#appMenu-new-window-button2,*/
     #appMenu-protonMainView toolbarseparator, /* all separators */
-    #appMenu-save-file-button2, /* Save file can be done from Print too */
+    /*#appMenu-save-file-button2, /* Save file can be done from Print too */
     #appMenu-fullscreen-button2,
     #appMenu-passwords-button, /* accessible from settings */
-    #appMenu-extensions-themes-button, /* accessible from settings */
+    /*#appMenu-extensions-themes-button, /* accessible from settings */
-    #appMenu-bookmarks-button, /* submenu */
+    /*#appMenu-bookmarks-button, /* submenu */
-    #appMenu-history-button, /* submenu */
+    /*#appMenu-history-button, /* submenu */
-    #appMenu-more-button2, /* submenu */
+    /*#appMenu-more-button2, /* submenu */
-    #appMenu-help-button2, /* submenu */
+    /*#appMenu-help-button2, /* submenu */
     .subviewbutton[shortcut]::after { /* menu shortcuts ("Ctrl+T" etc.) */
         display: none !important;
     }

src/userChrome/borderless_transparent_active_tab.css

@@ -0,0 +1,12 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Tab color */
+.tab-background {
+    background-color: transparent !important;
+}
+
+/* Tab border */
+.tab-background[selected] {
+    border: 0 transparent !important;
+}

src/userChrome/browser.css

@@ -1,10 +1,11 @@
 /* Copyright 2022 plata
  * SPDX-License-Identifier: MPL-2.0 */
 
-/* Move navigation bar to bottom */
 @media (max-width: 700px) {
+    /* Move navigation bar to bottom */
     #browser {
-        -moz-box-ordinal-group: 0 !important;
+        -moz-box-ordinal-group: 0 !important; /* before FF 113 */
+        order: -1 !important; /* since FF 113 */
     }
 
     /* Hide navigation bar in kiosk mode (to prevent bug #29). We can assume FF
@@ -15,4 +16,60 @@
     #TabsToolbar[inFullscreen] {
         display: none;
     }
+
+    /* Hide minimize/maximize/close buttons */
+    .titlebar-buttonbox-container {
+        display: none;
+    }
+
+    /* https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/toolbars_below_content.css  */
+    #TabsToolbar > .titlebar-buttonbox-container {
+      display: none;
+    }
+    /* Fix panels sizing */
+    .panel-viewstack {
+      max-height: unset !important;
+    }
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --widget-overflow-margin: 66px;
+        --unified-extensions-panel-margin: 66px;
+        --customizationui-widget-panel-margin: 66px;
+        --appMenu-popup-margin: 66px;
+        --BMB_bookmarksPopup-margin: 66px;
+    }
+    :root[uidensity="touch"] {
+        --widget-overflow-margin: 72px;
+        --unified-extensions-panel-margin: 72px;
+        --customizationui-widget-panel-margin: 72px;
+        --appMenu-popup-margin: 72px;
+        --BMB_bookmarksPopup-margin: 72px;
+    }
+
+    /* Adjust Widget Overflow Menu (») spawn height */
+    #widget-overflow {
+        margin-bottom: var(--widget-overflow-margin) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: var(--unified-extensions-panel-margin) !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: var(--customizationui-widget-panel-margin) !important;
+    }
+
+    /* Adjust Main App Menu (≡) spawn height */
+    #appMenu-popup {
+        margin-bottom: var(--appMenu-popup-margin) !important;
+    }
+
+    /* Adjust Bookmarks Menu (★) spawn height */
+    #BMB_bookmarksPopup {
+        margin-bottom: var(--BMB_bookmarksPopup-margin) !important;
+    }
+
 }

src/userChrome/color_variable_template.css

@@ -1,48 +0,0 @@
-/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/color_variable_template.css made available under Mozilla Public License v. 2.0
-See the above repository for updates as well as full license text. */
-
-/* You should enable any non-default theme for these to apply properly. Built-in dark and light themes should work */
-:root{
-  /* Popup panels */
-  --arrowpanel-background: olive !important;
-  --arrowpanel-border-color: green !important;
-  --arrowpanel-color: cyan !important;
-  --arrowpanel-dimmed: rgba(0,0,0,0.4) !important;
-  /* window and toolbar background */
-  --lwt-accent-color: red !important;
-  --lwt-accent-color-inactive: green !important;
-  --toolbar-bgcolor: rgba(0,0,0,0.4) !important;  
-  /* tabs with system theme - text is not controlled by variable */
-  --tab-selected-bgcolor: powderblue !important;
-  /* tabs with any other theme */
-  --lwt-text-color: cyan !important;
-  --lwt-selected-tab-background-color: cornflowerblue !important;
-  /* toolbar area */
-  --toolbarbutton-icon-fill: white !important;
-  --lwt-toolbarbutton-hover-background: orange !important;
-  --lwt-toolbarbutton-active-background: red !important;
-  /* urlbar */
-  --toolbar-field-border-color: green !important;
-  --toolbar-field-focus-border-color: pink !important;
-  --urlbar-popup-url-color: cyan !important;
-  /* urlbar Firefox < 92 */
-  --lwt-toolbar-field-background-color: olive !important;
-  --lwt-toolbar-field-focus: grey !important;
-  --lwt-toolbar-field-color: red !important;
-  --lwt-toolbar-field-focus-color: white !important;
-  /* urlbar Firefox 92+ */
-  --toolbar-field-background-color: olive !important;
-  --toolbar-field-focus-background-color: grey !important;
-  --toolbar-field-color: red !important;
-  --toolbar-field-focus-color: white !important;
-  /* sidebar - note the sidebar-box rule for the header-area */
-  --lwt-sidebar-background-color: purple !important;
-  --lwt-sidebar-text-color: yellow !important;
-}
-/* line between nav-bar and tabs toolbar,
-    also fallback color for border around selected tab */
-#navigator-toolbox{ --lwt-tabs-border-color: cyan !important; }
-/* Line above tabs */
-#tabbrowser-tabs{ --lwt-tab-line-color: white !important; }
-/* the header-area of sidebar needs this to work */
-#sidebar-box{ --sidebar-background-color: purple !important; }

src/userChrome/colorful_inactive_tabs.css

@@ -0,0 +1,31 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Inactive tab color */
+.tabbrowser-tab:not(:hover,[pinned], [selected]) > .tab-stack > .tab-background {
+    background-color: var(--lwt-selected-tab-background-color) !important;
+}
+
+/* Inactive tab color on hover */
+.tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected]) {
+    background-color: var(--lwt-accent-color-inactive) !important;
+}
+
+/* Inactive pinned tab icon color */
+.tab-icon-image[pinned]:not([selected]) {
+    color: var(--lwt-accent-color) !important;
+}
+
+/* Inactive tab text and close button (x) color */
+.tab-text:not([pinned]):not([selected]),
+.tab-icon-image:not([pinned]):not([selected]),
+.tab-close-button:not([pinned]):not([selected]) {
+    color: var(--lwt-text-color) !important;
+}
+
+/* Inactive tab text and close button (x) color on hover */
+.tabbrowser-tab:not([selected]):hover .tab-text,
+.tabbrowser-tab:not([selected]):hover .tab-icon-image,
+.tabbrowser-tab:not([selected]):hover .tab-close-button {
+    color: var(--lwt-accent-color) !important;
+}

src/userChrome/custom_rules.css

@@ -0,0 +1,80 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Disable tab loading burst
+   (because it's annoying) */
+   .tab-loading-burst {
+    display: none !important;
+}
+
+/* Tabs Toolbar and Container tab line color
+   (hides container tab line above tab by making it the same color as the Tabs Toolbar) */
+#TabsToolbar,
+.tabbrowser-tab[usercontextid] > .tab-stack > .tab-background > .tab-context-line {
+    background-color: var(--tab-bgcolor) !important;
+}
+
+/* Menubar color
+   (hides the line at the top of the screen when Menubar is hidden) */
+toolbar[type=menubar] {
+    background-color: black !important;
+    color: var(--toolbar-color) !important;
+}
+
+/* Navbar bottom border color */
+#navigator-toolbox {
+    border-bottom-color: black !important;
+}
+
+/* Resist Fingerprinting Letterbox background color */
+:root {
+    --tabpanel-background-color: black !important;
+}
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Remove Fullscreen popup */
+    .pointerlockfswarning {
+        display: none !important;
+    }
+
+    /* Remove tab overflow indicators */
+    spacer[part=overflow-start-indicator],
+    spacer[part=overflow-end-indicator] {
+        display: none !important;
+    }
+
+    /* Remove spacers on left and right of main tab view */
+    #tabbrowser-tabs[haspinnedtabs]:not([positionpinnedtabs]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab[first-visible-unpinned-tab] {
+        margin-inline-start: 0px !important;
+    }
+    .titlebar-spacer[type="post-tabs"] {
+        display: none !important;
+    }
+
+    /* Remove items from URL Bar */
+    #tracking-protection-icon-container,
+    #identity-permission-box,
+    #userContext-indicator,
+    /*#page-action-buttons,*/
+    #pageActionButton {
+        display: none !important;
+    }
+
+    /* URL Bar font resizing */
+    #urlbar-input {
+        font-size: 10pt !important;
+    }
+    #urlbar[focused] #urlbar-input {
+        font-size: calc(var(--urlbar-height) - 9px) !important;
+    }
+
+    /* Hide inactive tab close button (x)
+         to prevent accidentally closing tabs when selecting them */
+    .tab-close-button:not([selected]),
+    .tabbrowser-tab:not([selected]):hover .tab-close-button {
+        visibility: hidden !important;
+    }
+
+}

src/userChrome/dynamic_popups.css

@@ -0,0 +1,86 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --unified-extensions-panel-padding: 112px;
+        --customizationui-widget-panel-padding: 112px;
+    }
+    :root[uidensity="touch"] {
+        --unified-extensions-panel-padding: 110px;
+        --customizationui-widget-panel-padding: 110px;
+    }
+
+    /* Dynamically expand popups */
+    #unified-extensions-view {
+        height: calc(100vh - 171px) !important;
+        max-height: calc(100vh - 171px) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 165px) !important;
+        max-height: calc(100vh - 165px) !important;
+    }
+    #appMenu-popup,
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 0 !important;
+        height: calc(100vh - 107px) !important;
+        max-height: calc(100vh - 107px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu and Tab Manager Menu to fill screen width */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        padding: 0 !important;
+    }
+    #customizationui-widget-multiview {
+        width: 100vw !important;
+    }
+    #allTabsMenu-allTabsView-tabs {
+        max-width: calc(100vw - 10px) !important;
+    }
+    #unified-extensions-view,
+    #allTabsMenu-containerTabsButton,
+    .all-tabs-item {
+        width: calc(100vw - 10px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: 6px !important;
+        padding-top: var(--unified-extensions-panel-padding) !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: 6px !important;
+        padding-top: var(--customizationui-widget-panel-padding) !important;
+    }
+
+    /* Blend panels into background */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        background-color: black !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 350px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 300px !important;
+    }
+
+}

src/userChrome/dynamic_popups_max.css

@@ -0,0 +1,88 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --unified-extensions-view-height: calc(100vh - 57px);
+        --customizationui-widget-height: calc(100vh - 51px);
+        --unified-extensions-panel-margin: 5px;
+        --customizationui-widget-panel-margin: 5px;
+    }
+    :root[uidensity="touch"] {
+        --unified-extensions-view-height: calc(100vh - 61px);
+        --customizationui-widget-height: calc(100vh - 55px);
+        --unified-extensions-panel-margin: 6px;
+        --customizationui-widget-panel-margin: 6px;
+    }
+
+    /* Dynamically expand popups */
+    #unified-extensions-view {
+        height: var(--unified-extensions-view-height) !important;
+        max-height: var(--unified-extensions-view-height) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: var(--customizationui-widget-height) !important;
+        max-height: var(--customizationui-widget-height) !important;
+    }
+    #appMenu-popup,
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 0 !important;
+        height: calc(100vh - 107px) !important;
+        max-height: calc(100vh - 107px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu and Tab Manager Menu to fill screen width */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        padding: 0 !important;
+    }
+    #customizationui-widget-multiview {
+        width: 100vw !important;
+    }
+    #allTabsMenu-allTabsView-tabs {
+        max-width: calc(100vw - 10px) !important;
+    }
+    #unified-extensions-view,
+    #allTabsMenu-containerTabsButton,
+    .all-tabs-item {
+        width: calc(100vw - 10px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: var(--unified-extensions-panel-margin) !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: var(--customizationui-widget-panel-margin) !important;
+    }
+
+    /* Blend panels into background */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        background-color: black !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 370px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 300px !important;
+    }
+
+}

src/userChrome/dynamic_popups_plus.css

@@ -0,0 +1,71 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --unified-extensions-panel-padding: 25px;
+        --customizationui-widget-panel-padding: 25px;
+    }
+    :root[uidensity="touch"] {
+        --unified-extensions-panel-padding: 22px;
+        --customizationui-widget-panel-padding: 22px;
+    }
+
+    /* Dynamically expand popups */
+    #unified-extensions-view {
+        height: calc(100vh - 100px) !important;
+        max-height: calc(100vh - 100px) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 95px) !important;
+        max-height: calc(100vh - 95px) !important;
+    }
+    #appMenu-popup,
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 0 !important;
+        height: calc(100vh - 107px) !important;
+        max-height: calc(100vh - 107px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: 6px !important;
+        padding-top: var(--unified-extensions-panel-padding) !important;
+        padding-bottom: 17px !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: 6px !important;
+        padding-top: var(--customizationui-widget-panel-padding) !important;
+        padding-bottom: 17px !important;
+    }
+
+    /* Blend panels into background */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        background-color: black !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: calc(100vw - 20px) !important;
+        min-width: calc(100vw - 20px) !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 350px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 300px !important;
+    }
+
+}

src/userChrome/dynamic_popups_pro.css

@@ -0,0 +1,83 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Dynamically expand popups */
+    #unified-extensions-view {
+        height: calc(100vh - 171px) !important;
+        max-height: calc(100vh - 171px) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 165px) !important;
+        max-height: calc(100vh - 165px) !important;
+    }
+    #appMenu-popup,
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 0 !important;
+        height: calc(100vh - 107px) !important;
+        max-height: calc(100vh - 107px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu and Tab Manager Menu to fill screen width */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        padding: 0 !important;
+    }
+    #customizationui-widget-multiview {
+        width: 100vw !important;
+    }
+    #allTabsMenu-allTabsView-tabs {
+        max-width: calc(100vw - 10px) !important;
+    }
+    #unified-extensions-view,
+    #allTabsMenu-containerTabsButton,
+    .all-tabs-item {
+        width: calc(100vw - 10px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: 6px !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: 6px !important;
+    }
+
+    /* Blend panels with views */
+    panel {
+        --panel-background: none !important;
+        --panel-shadow: none !important;
+    }
+    #unified-extensions-panel {
+        background-color: var(--arrowpanel-background) !important;
+    }
+    #customizationui-widget-panel {
+        /* Default color: */
+        /*background-color: var(--arrowpanel-background) !important;*/
+        /* Fenix color: */
+        background-color: var(--toolbar-bgcolor) !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 350px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 300px !important;
+    }
+
+}

src/userChrome/dynamic_popups_pro_max.css

@@ -0,0 +1,97 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --unified-extensions-view-height: calc(100vh - 57px);
+        --customizationui-widget-height: calc(100vh - 51px);
+        --unified-extensions-panel-margin: 5px;
+        --customizationui-widget-panel-margin: 5px;
+    }
+    :root[uidensity="touch"] {
+        --unified-extensions-view-height: calc(100vh - 61px);
+        --customizationui-widget-height: calc(100vh - 55px);
+        --unified-extensions-panel-margin: 6px;
+        --customizationui-widget-panel-margin: 6px;
+    }
+
+    /* Dynamically expand popups */
+    #unified-extensions-view {
+        height: var(--unified-extensions-view-height) !important;
+        max-height: var(--unified-extensions-view-height) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: var(--customizationui-widget-height) !important;
+        max-height: var(--customizationui-widget-height) !important;
+    }
+    #appMenu-popup,
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 0 !important;
+        height: calc(100vh - 107px) !important;
+        max-height: calc(100vh - 107px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu and Tab Manager Menu to fill screen width */
+    #unified-extensions-panel,
+    #customizationui-widget-panel {
+        padding: 0 !important;
+    }
+    #customizationui-widget-multiview {
+        width: 100vw !important;
+    }
+    #allTabsMenu-allTabsView-tabs {
+        max-width: calc(100vw - 10px) !important;
+    }
+    #unified-extensions-view,
+    #allTabsMenu-containerTabsButton,
+    .all-tabs-item {
+        width: calc(100vw - 10px) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: var(--unified-extensions-panel-margin) !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: var(--customizationui-widget-panel-margin) !important;
+    }
+
+    /* Blend panels with views */
+    panel {
+        --panel-background: none !important;
+        --panel-shadow: none !important;
+    }
+    #unified-extensions-panel {
+        background-color: var(--arrowpanel-background) !important;
+    }
+    #customizationui-widget-panel {
+        /* Default color: */
+        /*background-color: var(--arrowpanel-background) !important;*/
+        /* Fenix color: */
+        background-color: var(--toolbar-bgcolor) !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 370px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 300px !important;
+    }
+
+}

src/userChrome/editBookmarkPanel.css

@@ -9,10 +9,15 @@
      * testing. */
 
     #editBookmarkPanel {
-        margin-top: -390px !important;
+        /*margin-top: -390px !important;
         height: 200px;
         max-height: 200px;
-        max-width: calc(100vw - 100px);
+        max-width: calc(100vw - 100px);*/
+        background-color: var(--arrowpanel-background) !important;
+        margin-bottom: 225px !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
     }
 
     #editBookmarkPanel box.panel-header,
@@ -21,9 +26,11 @@
     }
 
     #editBookmarkPanelContent {
-        max-width: 250px !important;
+        /*max-width: 250px !important;
         width: 250px !important;
-        padding-right: 20px;
+        padding-right: 20px;*/
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
     }
 
     /* Hide the screenshot and the line below it. The page is right there when
@@ -44,10 +51,12 @@
     }
 
     #editBookmarkPanelBottomButtons {
-        width: 250px !important;
+        /*width: 250px !important;
         min-width: 250px !important;
         padding: 0px !important;
         justify-content: flex-start !important;
-        margin: 0px 0px 20px 0px !important;
+        margin: 0px 0px 20px 0px !important;*/
+        margin-top: -5px !important;
+        margin-left: -50px !important;
     }
 }

src/userChrome/extensions_menu.css

@@ -0,0 +1,44 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Remove header, separators, and manage-extensions button */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: 100vw !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 325px !important;
+        max-height: 325px !important;
+        width: calc(100vw - 30px) !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: calc(100vw - 20px) !important;
+        min-width: calc(100vw - 20px) !important;
+    }
+
+}

src/userChrome/fenix-alt.css

@@ -0,0 +1,364 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Main App Menu (≡) item icons */
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before,
+#appMenu-protonMainView > .panel-subview-body > toolbarbutton > image {
+  fill: currentColor;
+  -moz-context-properties: fill;
+  margin-inline: 0 20px !important;
+}
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+  display: flex;
+  content: "";
+  width: 16px;
+  height: 16px;
+}
+#appMenu-new-tab-button2 {
+    order: 1 !important;
+    list-style-image: url("chrome://global/skin/icons/plus.svg");
+}
+#appMenu-bookmarks-button {
+    order: 2 !important;
+    list-style-image: url("chrome://browser/skin/bookmark-star-on-tray.svg");
+}
+#appMenu-history-button {
+    order: 3 !important;
+    list-style-image: url("chrome://browser/skin/history.svg");
+}
+#appMenu-downloads-button {
+    order: 4 !important;
+    list-style-image: url("chrome://browser/skin/downloads/downloads.svg");
+}
+#appMenu-extensions-themes-button {
+    order: 5 !important;
+    list-style-image: url("chrome://mozapps/skin/extensions/extension.svg");
+}
+#appMenu-passwords-button {
+    order: 6 !important;
+    list-style-image: url("chrome://browser/skin/login.svg");
+}
+#appMenu-find-button2 {
+    order: 7 !important;
+    list-style-image: url("chrome://global/skin/icons/search-glass.svg");
+}
+#appMenu-zoom-controls {
+    order: 8 !important;
+}
+#appMenu-zoom-controls::before {
+    background-image: url("chrome://browser/skin/fullscreen.svg");
+}
+#appMenu-new-window-button2 {
+    order: 9 !important;
+    list-style-image: url("chrome://browser/skin/window.svg");
+}
+#appMenu-new-private-window-button2 {
+    order: 10 !important;
+    list-style-image: url("chrome://browser/skin/privateBrowsing.svg");
+}
+#appMenu-save-file-button2 {
+    order: 11 !important;
+    list-style-image: url("chrome://browser/skin/save.svg");
+}
+#appMenu-print-button2 {
+    order: 12 !important;
+    list-style-image: url("chrome://global/skin/icons/print.svg");
+}
+#appMenu-help-button2 {
+    order: 13 !important;
+    list-style-image: url("chrome://global/skin/icons/help.svg");
+}
+#appMenu-more-button2 {
+    order: 14 !important;
+    list-style-image: url("chrome://global/skin/icons/developer.svg");
+}
+#appMenu-settings-button {
+    order: 15 !important;
+    list-style-image: url("chrome://global/skin/icons/settings.svg");
+}
+#appMenu-quit-button2 {
+    order: 16 !important;
+    list-style-image: url("chrome://devtools/skin/images/search-clear.svg");
+}
+/* Use account-button icon for signed in sync item */
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+    background-image: var(--avatar-image-url)
+}
+
+/* Apply this customization only on smaller screens in landscape mode */
+@media (max-height: 300px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --urlbar-width: calc(100vw - 188.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --urlbar-width: calc(100vw - 196.5px);
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Find Bar */
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 8px !important;
+        font-weight: 600 !important;
+        font-family: "Noto Sans" !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar {
+        width: var(--urlbar-width) !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+}
+
+/* Apply this customization only on smaller screens in portait mode */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 4px;
+        --urlbar-width: calc(100vw - 110.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 5px;
+        --urlbar-width: calc(100vw - 114.5px);
+    }
+
+    /* Main App Menu (≡) */
+    #appMenu-popup {
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        padding-top: 8px !important;
+        width: 230px !important;
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Hide Back button, Tab Bar, and Private Browsing Indicator */
+    #back-button,
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Find Bar */
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 9px !important;
+        font-weight: 600 !important;
+    }
+
+    /* Move Tab Manager Menu button to right of urlbar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+}

src/userChrome/fenix.css

@@ -0,0 +1,364 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Main App Menu (≡) item icons */
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before,
+#appMenu-protonMainView > .panel-subview-body > toolbarbutton > image {
+  fill: currentColor;
+  -moz-context-properties: fill;
+  margin-inline: 0 20px !important;
+}
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+  display: flex;
+  content: "";
+  width: 16px;
+  height: 16px;
+}
+#appMenu-new-tab-button2 {
+    order: 1 !important;
+    list-style-image: url("chrome://global/skin/icons/plus.svg");
+}
+#appMenu-bookmarks-button {
+    order: 2 !important;
+    list-style-image: url("chrome://browser/skin/bookmark-star-on-tray.svg");
+}
+#appMenu-history-button {
+    order: 3 !important;
+    list-style-image: url("chrome://browser/skin/history.svg");
+}
+#appMenu-downloads-button {
+    order: 4 !important;
+    list-style-image: url("chrome://browser/skin/downloads/downloads.svg");
+}
+#appMenu-extensions-themes-button {
+    order: 5 !important;
+    list-style-image: url("chrome://mozapps/skin/extensions/extension.svg");
+}
+#appMenu-passwords-button {
+    order: 6 !important;
+    list-style-image: url("chrome://browser/skin/login.svg");
+}
+#appMenu-find-button2 {
+    order: 7 !important;
+    list-style-image: url("chrome://global/skin/icons/search-glass.svg");
+}
+#appMenu-zoom-controls {
+    order: 8 !important;
+}
+#appMenu-zoom-controls::before {
+    background-image: url("chrome://browser/skin/fullscreen.svg");
+}
+#appMenu-new-window-button2 {
+    order: 9 !important;
+    list-style-image: url("chrome://browser/skin/window.svg");
+}
+#appMenu-new-private-window-button2 {
+    order: 10 !important;
+    list-style-image: url("chrome://browser/skin/privateBrowsing.svg");
+}
+#appMenu-save-file-button2 {
+    order: 11 !important;
+    list-style-image: url("chrome://browser/skin/save.svg");
+}
+#appMenu-print-button2 {
+    order: 12 !important;
+    list-style-image: url("chrome://global/skin/icons/print.svg");
+}
+#appMenu-help-button2 {
+    order: 13 !important;
+    list-style-image: url("chrome://global/skin/icons/help.svg");
+}
+#appMenu-more-button2 {
+    order: 14 !important;
+    list-style-image: url("chrome://global/skin/icons/developer.svg");
+}
+#appMenu-settings-button {
+    order: 15 !important;
+    list-style-image: url("chrome://global/skin/icons/settings.svg");
+}
+#appMenu-quit-button2 {
+    order: 16 !important;
+    list-style-image: url("chrome://devtools/skin/images/search-clear.svg");
+}
+/* Use account-button icon for signed in sync item */
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+    background-image: var(--avatar-image-url)
+}
+
+/* Apply this customization only on smaller screens in landscape mode */
+@media (max-height: 300px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --urlbar-width: calc(100vw - 188.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --urlbar-width: calc(100vw - 196.5px);
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Find Bar */
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 8px !important;
+        font-weight: 600 !important;
+        font-family: "Noto Sans" !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar {
+        width: var(--urlbar-width) !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+}
+
+/* Apply this customization only on smaller screens in portait mode */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 3.5px;
+        --urlbar-width: calc(100vw - 110.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 4.5px;
+        --urlbar-width: calc(100vw - 114.5px);
+    }
+
+    /* Main App Menu (≡) */
+    #appMenu-popup {
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        padding-top: 8px !important;
+        width: 230px !important;
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Hide Back button, Tab Bar, and Private Browsing Indicator */
+    #back-button,
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Find Bar */
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 9px !important;
+        font-weight: 600 !important;
+    }
+
+    /* Move Tab Manager Menu button to right of urlbar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+}

src/userChrome/fenix_colors.css

@@ -0,0 +1,242 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/color_variable_template.css made available under Mozilla Public License v. 2.0
+See the above repository for updates as well as full license text. */
+
+:root {
+    /* Popup panels */
+    --arrowpanel-background: rgb(41,29,79) !important;
+    --arrowpanel-border-color: transparent !important;
+    --arrowpanel-color: white !important;
+    --arrowpanel-dimmed: rgb(97,84,124) !important;
+    --arrowpanel-dimmed-further: rgb(66,50,98) !important;
+    --panel-background: rgb(41,29,79) !important;
+    --panel-border-color: transparent !important;
+    --panel-color: white !important;
+    --panel-separator-color: transparent !important;
+    --panel-item-hover-bgcolor: rgba(255,255,255,0.2) !important;
+    --panel-item-active-bgcolor: rgba(255,255,255,0.2) !important;
+    --panel-banner-item-background-color: rgb(117,66,228) !important;
+    --panel-banner-item-hover-bgcolor: rgb(69,68,76) !important;
+    --panel-banner-item-active-bgcolor: rgb(69,68,76) !important;
+    --panel-banner-item-update-supported-bgcolor: rgb(117,66,228) !important;
+    --panel-banner-item-info-icon-bgcolor: rgb(117,66,228) !important;
+    --panel-banner-item-color: white !important;
+    --panel-description-color: white !important;
+    --panel-disabled-color: gray !important;
+    --menuitem-disabled-hover-background-color: transparent !important;
+
+    /* window and toolbar background */
+    --lwt-accent-color: rgb(117,66,228) !important;
+    --lwt-accent-color-inactive: rgba(117,66,228,0.3) !important;
+    --toolbar-non-lwt-bgcolor: rgb(41,29,79) !important;
+    --toolbar-non-lwt-textcolor: white !important;
+    --toolbar-bgcolor: rgb(43,42,51) !important;
+    --toolbar-color: rgb(171,113,255) !important;
+    --tabpanel-background-color: black !important;
+
+    /* tabs with system theme - text is not controlled by variable */
+    --tab-selected-bgcolor: rgb(117,66,228) !important;
+
+    /* tabs with any other theme */
+    --lwt-text-color: white !important;
+    --lwt-selected-tab-background-color: rgb(117,66,228) !important;
+
+    /* toolbar area */
+    --toolbarbutton-icon-fill: white !important;
+    --toolbarbutton-icon-fill-attention: white !important;
+    --toolbarbutton-hover-background: rgba(255,255,255,0.2) !important;
+    --toolbarbutton-active-background: rgba(255,255,255,0.2) !important;
+    --lwt-toolbarbutton-icon-fill-attention: white !important;
+    --lwt-toolbarbutton-hover-background: rgba(255,255,255,0.2) !important;
+    --lwt-toolbarbutton-active-background: rgba(255,255,255,0.2) !important;
+    --toolbarseparator-color: black !important;
+
+    /* urlbar */
+    --toolbar-field-border-color: rgb(28,27,34) !important;
+    --toolbar-field-focus-border-color: rgb(28,27,34) !important;
+    --urlbar-popup-url-color: white !important;
+    --urlbar-box-bgcolor: var(--button-bgcolor);
+    --urlbar-box-focus-bgcolor: var(--button-bgcolor);
+    --urlbar-box-hover-bgcolor: var(--button-hover-bgcolor);
+    --urlbar-box-active-bgcolor: var(--button-active-bgcolor);
+    --urlbar-box-text-color: inherit;
+    --urlbar-box-hover-text-color: var(--urlbar-box-text-color);
+    --lwt-brighttext-url-color: #00ddff;
+
+    /* urlbar Firefox < 92 */
+    --lwt-toolbar-field-background-color: rgb(28,27,34) !important;
+    --lwt-toolbar-field-focus: white !important;
+    --lwt-toolbar-field-color: white !important;
+    --lwt-toolbar-field-focus-color: white !important;
+
+    /* urlbar Firefox 92+ */
+    --toolbar-field-background-color: rgb(28,27,34) !important;
+    --toolbar-field-focus-background-color: rgb(28,27,34) !important;
+    --toolbar-field-icon-fill-attention: rgb(117,66,228) !important;
+    --toolbar-field-color: white !important;
+    --toolbar-field-focus-color: white !important;
+
+    /* sidebar - note the sidebar-box rule for the header-area */
+    --lwt-sidebar-background-color: rgb(41,29,79) !important;
+    --lwt-sidebar-text-color: white !important;
+
+    /* findbar */
+    --focus-outline-color: rgb(117,66,228) !important;
+    --input-border-color: rgb(117,66,228) !important;
+
+/* buttons and checkboxes */
+    --button-bgcolor: rgb(117,66,228) !important;
+    --button-color: white !important;
+    --button-hover-bgcolor: rgb(144,89,255) !important;
+    --button-active-bgcolor: rgb(144,89,255) !important;
+    --button-primary-bgcolor: rgb(117,66,228) !important;
+    --button-primary-hover-bgcolor: rgb(144,89,255) !important;
+    --button-primary-active-bgcolor: rgb(144,89,255) !important;
+    --button-primary-color: white !important;
+    --in-content-primary-button-background: rgb(117,66,228) !important;
+    --in-content-primary-button-background-hover: rgb(144,89,255) !important;
+    --in-content-primary-button-background-active: rgb(144,89,255) !important;
+    --buttons-destructive-bgcolor: #e22850;
+    --buttons-destructive-hover-bgcolor: #c50042;
+    --buttons-destructive-active-bgcolor: #810220;
+    --buttons-destructive-color: #fbfbfe;
+    --checkbox-unchecked-bgcolor: rgb(41,29,79) !important;
+    --checkbox-unchecked-hover-bgcolor: rgb(144,89,255) !important;
+    --checkbox-unchecked-active-bgcolor: rgb(144,89,255) !important;
+    --checkbox-checked-border-color: rgb(117,66,228) !important;
+    --checkbox-checked-bgcolor: rgb(117,66,228) !important;
+    --checkbox-checked-color: white !important;
+    --checkbox-checked-hover-bgcolor: rgba(144,89,255) !important;
+    --checkbox-checked-active-bgcolor: rgba(144,89,255) !important;
+    --uc-checkbox-checked-bgcolor: rgb(117,66,228) !important;
+
+    /* icon glow */
+    --uc-icon-glow-primary: rgb(117,66,228);
+    --uc-icon-glow-secondary: white;
+    --uc-icon-glow-hover-primary: rgb(117,66,228);
+    --uc-icon-glow-hover-secondary: white;
+}
+
+/* line between nav-bar and tabs toolbar,
+        also fallback color for border around selected tab */
+#navigator-toolbox {
+    --lwt-tabs-border-color: rgb(65,64,72) !important;
+}
+
+/* Line above tabs */
+#tabbrowser-tabs {
+    --lwt-tab-line-color: none !important;
+}
+
+/* the header-area of sidebar needs this to work */
+#sidebar-box {
+    --sidebar-background-color: rgb(41,29,79) !important;
+}
+
+/* Find Bar */
+.findbar-find-previous,
+.findbar-find-next,
+input.findbar-textbox,
+findbar {
+    border: none !important;
+    box-shadow: none !important;
+    background-color: var(--arrowpanel-background) !important;
+    color: var(--toolbar-field-color) !important;
+}
+
+/* Context Menus */
+menupopup {
+    --panel-background: rgb(41,29,79) !important;
+    --panel-border-color: transparent !important;
+    --panel-color: white !important;
+    --panel-separator-color: transparent !important;
+}
+menuseparator {
+    display: none !important;
+}
+menu:hover,
+menuitem:hover {
+    background-color: var(--panel-item-hover-bgcolor) !important;
+    color: var(--panel-color) !important;
+}
+
+/* Menu popup shadow */
+.menupopup-arrowscrollbox {
+    box-shadow: 0 5px 5px -3px rgba(0,0,0,0.2),
+                0 8px 10px 1px rgba(0,0,0,0.14),
+                0 3px 14px 2px rgba(0,0,0,0.12) !important;
+}
+
+/* "Saved to Library!" popup notification */
+#confirmation-hint {
+    --panel-background: var(--lwt-accent-color) !important;
+    --panel-border-color: var(--lwt-accent-color) !important;
+    --panel-color: var(--lwt-text-color) !important;
+}
+
+/* "Confirm before closing multiple tabs" popup checkboxes and dialog buttons */
+.checkbox-check {
+    background-color: var(--buttons-destructive-bgcolor) !important;
+    color: var(--buttons-destructive-color) !important;
+}
+.dialog-button-box > button:nth-child(6) {
+    background-color: var(--buttons-destructive-bgcolor) !important;
+    color: var(--buttons-destructive-color) !important;
+}
+
+/* Main App Menu (≡), Tab Manager Menu, and Unified Extensions Menu */
+panel {
+    --panel-background: black !important;
+    --panel-shadow: none !important;
+}
+.panel-viewstack {
+    background-color: var(--arrowpanel-background) !important;
+    border-color: var(--arrowpanel-background) !important;
+}
+
+/* Tab Manager Menu */
+#allTabsMenu-allTabsView-tabs,
+#allTabsMenu-allTabsView,
+#allTabsMenu-containerTabsView {
+    background-color: var(--toolbar-bgcolor) !important;
+}
+#allTabsMenu-containerTabsButton,
+#allTabsMenu-containerTabsView > .panel-header {
+    color: var(--toolbar-color) !important;
+}
+#allTabsMenu-containerTabsButton:hover {
+    background-color: var(--panel-banner-item-hover-bgcolor) !important;
+}
+.all-tabs-item[selected] {
+    background-color: var(--arrowpanel-dimmed-further) !important;
+}
+.all-tabs-item:hover[selected] {
+    --panel-item-active-bgcolor: transparent !important;
+    --panel-item-hover-bgcolor: transparent !important;
+    background-color: var(--arrowpanel-dimmed) !important;
+}
+.all-tabs-item:hover:not([selected]) {
+    --panel-item-active-bgcolor: transparent !important;
+    --panel-item-hover-bgcolor: transparent !important;
+    background-color: var(--panel-banner-item-hover-bgcolor) !important;
+}
+.all-tabs-close-button:hover {
+    background-color: var(--toolbarbutton-hover-background) !important;
+}
+
+/* Private Browsing Mode theme for URL Bar and Nav Bar */
+:root {
+    --toolbar-field-border-color: var(--arrowpanel-background) !important;
+    --toolbar-field-focus-border-color: var(--arrowpanel-background) !important;
+    --lwt-toolbar-field-background-color: var(--arrowpanel-background) !important;
+    --toolbar-field-background-color: var(--arrowpanel-background) !important;
+    --toolbar-field-focus-background-color: var(--arrowpanel-background) !important;
+}
+#nav-bar {
+    background-image: -moz-linear-gradient(to right, rgb(112,34,145), rgb(57,52,115)) !important;
+}
+#navigator-toolbox {
+    --lwt-tabs-border-color: rgb(134,93,180) !important;
+}

src/userChrome/fenix_fox-alt.css

@@ -0,0 +1,818 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Resist Fingerprinting Letterbox background color and minimum width for display and URL Bar */
+:root {
+    --tabpanel-background-color: black !important;
+    min-width: 300px !important;
+}
+#urlbar-container {
+    min-width: 150px !important;
+    flex-shrink: 1 !important;
+}
+
+/* Menu Bar color
+   (hides the line at the top/bottom of the screen when Menubar is hidden) */
+toolbar[type=menubar] {
+    background-color: black !important;
+    color: var(--toolbar-color) !important;
+}
+
+/* Nav Bar bottom border color */
+#navigator-toolbox {
+    border-bottom-color: black !important;
+}
+
+/* Remove popup warning when enterimg Fullscreen */
+.pointerlockfswarning {
+    display: none !important;
+}
+
+/* Main App Menu (≡) item icons */
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before,
+#appMenu-protonMainView > .panel-subview-body > toolbarbutton > image {
+  fill: currentColor;
+  -moz-context-properties: fill;
+  margin-inline: 0 20px !important;
+}
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+  display: flex;
+  content: "";
+  width: 16px;
+  height: 16px;
+}
+#appMenu-new-tab-button2 {
+    order: 1 !important;
+    list-style-image: url("chrome://global/skin/icons/plus.svg");
+}
+#appMenu-bookmarks-button {
+    order: 2 !important;
+    list-style-image: url("chrome://browser/skin/bookmark-star-on-tray.svg");
+}
+#appMenu-history-button {
+    order: 3 !important;
+    list-style-image: url("chrome://browser/skin/history.svg");
+}
+#appMenu-downloads-button {
+    order: 4 !important;
+    list-style-image: url("chrome://browser/skin/downloads/downloads.svg");
+}
+#appMenu-extensions-themes-button {
+    order: 5 !important;
+    list-style-image: url("chrome://mozapps/skin/extensions/extension.svg");
+}
+#appMenu-passwords-button {
+    order: 6 !important;
+    list-style-image: url("chrome://browser/skin/login.svg");
+}
+#appMenu-find-button2 {
+    order: 7 !important;
+    list-style-image: url("chrome://global/skin/icons/search-glass.svg");
+}
+#appMenu-zoom-controls {
+    order: 8 !important;
+}
+#appMenu-zoom-controls::before {
+    background-image: url("chrome://browser/skin/fullscreen.svg");
+}
+#appMenu-new-window-button2 {
+    order: 9 !important;
+    list-style-image: url("chrome://browser/skin/window.svg");
+}
+#appMenu-new-private-window-button2 {
+    order: 10 !important;
+    list-style-image: url("chrome://browser/skin/privateBrowsing.svg");
+}
+#appMenu-save-file-button2 {
+    order: 11 !important;
+    list-style-image: url("chrome://browser/skin/save.svg");
+}
+#appMenu-print-button2 {
+    order: 12 !important;
+    list-style-image: url("chrome://global/skin/icons/print.svg");
+}
+#appMenu-help-button2 {
+    order: 13 !important;
+    list-style-image: url("chrome://global/skin/icons/help.svg");
+}
+#appMenu-more-button2 {
+    order: 14 !important;
+    list-style-image: url("chrome://global/skin/icons/developer.svg");
+}
+#appMenu-settings-button {
+    order: 15 !important;
+    list-style-image: url("chrome://global/skin/icons/settings.svg");
+}
+#appMenu-quit-button2 {
+    order: 16 !important;
+    list-style-image: url("chrome://devtools/skin/images/search-clear.svg");
+}
+/* Use account-button icon for signed in sync item */
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+    background-image: var(--avatar-image-url)
+}
+
+/* Show Tab Manager Menu button */
+#alltabs-button {
+    display: -moz-box !important;
+}
+
+/* Tab Manager Menu button tab counter */
+#TabsToolbar-customization-target {
+    counter-reset: tabCount;
+}
+.tabbrowser-tab {
+    counter-increment: tabCount;
+}
+#alltabs-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+    visibility: collapse !important;
+}
+#alltabs-button > .toolbarbutton-badge-stack {
+     position: relative !important;
+}
+#alltabs-button > .toolbarbutton-badge-stack::before {
+    content: counter(tabCount);
+    color: var(--toolbarbutton-icon-fill);
+    opacity: var(--toolbarbutton-icon-fill-opacity);
+    position: absolute;
+    bottom: var(--toolbarbutton-inner-padding);
+    left: 50%;
+    transform: translateX(-50%);
+}
+#alltabs-button > .toolbarbutton-badge-stack {
+    border-radius: var(--toolbarbutton-border-radius);
+}
+
+/* Tab Manager Menu tab counter */
+#allTabsMenu-allTabsViewTabs, /* before FF 106 */
+#allTabsMenu-allTabsView-tabs { /* since FF 106 */
+    counter-reset: nn_tabs 0 !important;
+}
+.all-tabs-button::before {
+    display: -moz-inline-box !important;
+    -moz-padding-end: 8px !important;
+    content: counter(nn_tabs) !important;
+    font-size: 12px !important;
+    margin-top: -2px !important;
+    margin-right: -2px !important;
+}
+.all-tabs-item {
+    counter-increment: nn_tabs !important;
+}
+
+/* Apply this customization only on smaller screens in landscape mode */
+@media (max-height: 300px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 4px;
+        --urlbar-width: calc(100vw - 188.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 5px;
+        --urlbar-width: calc(100vw - 196.5px);
+    }
+
+    /* Remove items from Main App Menu (≡) */
+    #appMenu-fxa-status2,
+    #appMenu-fxa-separator,
+    #appMenu-protonMainView toolbarseparator,
+    #appMenu-fullscreen-button2,
+    #appMenu-passwords-button,
+    .subviewbutton[shortcut]::after {
+        display: none !important;
+    }
+
+    /* Fix flickering of Main App Menu (≡) */
+    #appMenu-popup {
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        height: 253px !important;
+        max-height: 253px !important;
+        width: 250px !important;
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Hide Nav Bar when in Fullscreen mode */
+    #nav-bar[inFullscreen] {
+        display: none;
+    }
+
+    /* Edit Bookmark Panel */
+    #editBookmarkPanel {
+        background-color: var(--arrowpanel-background) !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
+    }
+    #editBookmarkPanel box.panel-header,
+    #editBookmarkHeaderSeparator,
+    #editBookmarkPanelInfoArea,
+    #editBookmarkSeparator,
+    #editBMPanel_folderRow,
+    #editBMPanel_tagsRow {
+        display: none !important;
+    }
+    #editBookmarkPanelContent {
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
+    }
+    #editBookmarkPanelBottomButtons {
+        margin-top: -5px !important;
+        margin-left: -50px !important;
+    }
+
+    /* Find Bar*/
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Remove items from Tab Manager Menu */
+    #allTabsMenu-searchTabs,
+    #allTabsMenu-tabsSeparator {
+        display: none;
+    }
+
+    /* Fix flickering of Tab Manager Menu and extension popups */
+    #customizationui-widget-panel,
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 35px) !important;
+        max-height: calc(100vh - 35px) !important;
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 8px !important;
+        font-weight: 600 !important;
+        font-family: "Noto Sans" !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Remove items from Unified Extensions Menu */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text in Unified Extensions Menu */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering of Unified Extensions Menu */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        width: 360px !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 230px !important;
+        max-height: 230px !important;
+        width: 350px !important;
+    }
+
+    /* Add padding to bottom of Unified Extensions Menu to look better */
+    #unified-extensions-area {
+        padding-bottom: 5px !important;
+    }
+
+    /* Allow extensions to use full display */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Adjust "Confirm before closing multiple tabs" popup */
+    .dialogFrame {
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+}
+
+/* Apply this customization only on smaller screens in portait mode */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 4px;
+        --urlbar-width: calc(100vw - 110.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 5px;
+        --urlbar-width: calc(100vw - 114.5px);
+    }
+
+    /* Main App Menu (≡) */
+    #appMenu-popup {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        height: 340px;
+        max-height: 340px;
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 4px !important;
+        height: 318px !important;
+        max-height: 318px !important;
+        width: 230px !important;
+    }
+    #appMenu-multiView box.panel-viewstack:first-child {
+        height: calc(100vh - 100px) !important;
+        max-height: calc(100vh - 100px) !important;
+    }
+    #appMenu-fxa-status2,
+    #appMenu-fxa-separator,
+    #appMenu-protonMainView toolbarseparator,
+    #appMenu-fullscreen-button2,
+    #appMenu-passwords-button,
+    .subviewbutton[shortcut]::after {
+        display: none !important;
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing Indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Hide Nav Bar when in Fullscreen mode */
+    #nav-bar[inFullscreen] {
+        display: none;
+    }
+
+    /* Edit Bookmark Panel */
+    #editBookmarkPanel {
+        background-color: var(--arrowpanel-background) !important;
+        margin-bottom: 225px !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
+    }
+    #editBookmarkPanel box.panel-header,
+    #editBookmarkHeaderSeparator,
+    #editBookmarkPanelInfoArea,
+    #editBookmarkSeparator,
+    #editBMPanel_folderRow,
+    #editBMPanel_tagsRow {
+        display: none !important;
+    }
+    #editBookmarkPanelContent {
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
+    }
+    #editBookmarkPanelBottomButtons {
+        margin-top: -5px !important;
+        margin-left: -50px !important;
+    }
+
+    /* Find Bar */
+    .findbar-container {
+        display: flex;
+        flex-direction: row;
+        flex-wrap: wrap;
+        height: 40px !important;
+    }
+    .findbar-textbox {
+        width: 100% !important;
+    }
+    .findbar-container checkbox {
+        padding: 10px 0px;
+    }
+    .findbar-highlight,
+    .findbar-case-sensitive,
+    .findbar-match-diacritics,
+    .findbar-entire-word,
+    /*.found-matches,*/
+    .findbar-find-status,
+    .find-status-icon {
+        display: none;
+    }
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Fix Popups */
+    #notification-popup {
+        margin-top: -500px !important;
+        margin-right: -500px !important;
+        height: calc(100vh - 250px) !important;
+        max-width: 100vw !important;
+    }
+    #downloadsPanel-mainView {
+        max-width: calc(100vw - 10px);
+    }
+    #backForwardMenu {
+        margin-top: -250px;
+        height: 200px;
+        min-height: 200px;
+        max-width: 100vw !important;
+    }
+    #context-inspect,
+    #context-inspect-a11y,
+    #context-savelinktopocket,
+    #context-searchselect,
+    #context-sendlinktodevice,
+    #context-viewpartialsource-selection,
+    #inspect-separator {
+        display: none !important
+    }
+    #protections-popup,
+    #permission-popup,
+    #widget-overflow,
+    #identity-popup {
+        max-width: 100vw !important;
+    }
+    #protections-popup-mainView {
+        min-width: 100vw !important;
+        max-width: 100vw !important;
+    }
+    #widget-overflow,
+    #widget-overflow-mainView {
+        height: calc(100vh - 80px) !important;
+    }
+    #customizationui-widget-panel {
+        width: 100vw !important;
+    }
+    #BMB_bookmarksPopup {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Tab Manager Menu */
+    #allTabsMenu-searchTabs,
+    #allTabsMenu-tabsSeparator {
+        display: none;
+    }
+    #customizationui-widget-panel {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+    }
+    #allTabsMenu-multiView box.panel-viewstack {
+        height: calc(100vh - 100px) !important;
+        max-height: calc(100vh - 100px) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: 330px !important;
+        max-height: 330px !important;
+    }
+    #allTabsMenu-allTabsViewTabs,
+    #allTabsMenu-allTabsView-tabs {
+        max-width: calc(100vw - 30px);
+        padding-top: 2px !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 8px !important;
+        font-weight: 600 !important;
+        font-family: "Noto Sans" !important;
+    }
+
+    /* Move Tab Manager Menu button to right of urlbar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Nav Bar */
+    #back-button,
+    #forward-button,
+    #customizableui-special-spring1,
+    #customizableui-special-spring2,
+    #library-button,
+    #sidebar-button,
+    #fxa-toolbar-menu-button {
+        display: none !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+    #urlbar {
+        padding: 0px 5px;
+    }
+    #urlbar-input {
+        font-size: 10pt !important;
+    }
+    #urlbar[focused] #urlbar-input {
+        font-size: calc(var(--urlbar-height) - 9px) !important;
+    }
+    #urlbar[focused] #remote-control-box,
+    #urlbar[focused] #identity-box,
+    #urlbar[focused] #tracking-protection-icon-container,
+    #urlbar[focused] #reader-mode-button,
+    #urlbar[focused] #page-action-buttons,
+    #tracking-protection-icon-container,
+    #identity-permission-box,
+    #userContext-indicator,
+    #pageActionButton {
+        display: none;
+    }
+    #identity-icon-label {
+        display: none;
+    }
+    .urlbarView {
+        position: fixed !important;
+        inset: 0px 0px 84px 0px;
+        width: 100% !important;
+        background: var(--arrowpanel-background);
+        margin: 0px !important;
+        margin-inline: 0px !important;
+        border-inline: 0px !important;
+        overflow-y:  auto !important;
+        overflow-x: none !important;
+        scrollbar-width: none;
+    }
+    #PersonalToolbar {
+        display: none;
+    }
+    :root {
+        --bookmarks-toolbar-overlapping-browser-height: 0 !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Remove items from Unified Extensions Menu */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text in Unified Extensions Menu */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering for Unified Extensions Menu */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: 100vw !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 325px !important;
+        max-height: 325px !important;
+        width: calc(100vw - 30px) !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: calc(100vw - 20px) !important;
+        min-width: calc(100vw - 20px) !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Adjust "Confirm before closing multiple tabs" popup */
+    .dialogFrame {
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 120px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 64px !important;
+    }
+
+}

src/userChrome/fenix_fox.css

@@ -0,0 +1,895 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Resist Fingerprinting Letterbox background color and minimum width for display and URL Bar */
+:root {
+    --tabpanel-background-color: black !important;
+    min-width: 300px !important;
+}
+#urlbar-container {
+    min-width: 150px !important;
+    flex-shrink: 1 !important;
+}
+
+/* Menu Bar color
+   (hides the line at the top/bottom of the screen when Menubar is hidden) */
+toolbar[type=menubar] {
+    background-color: black !important;
+    color: var(--toolbar-color) !important;
+}
+
+/* Nav Bar bottom border color */
+#navigator-toolbox {
+    border-bottom-color: black !important;
+}
+
+/* Remove popup warning when enterimg Fullscreen */
+.pointerlockfswarning {
+    display: none !important;
+}
+
+/* Main App Menu (≡) item icons */
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before,
+#appMenu-protonMainView > .panel-subview-body > toolbarbutton > image {
+  fill: currentColor;
+  -moz-context-properties: fill;
+  margin-inline: 0 20px !important;
+}
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+  display: flex;
+  content: "";
+  width: 16px;
+  height: 16px;
+}
+#appMenu-new-tab-button2 {
+    order: 1 !important;
+    list-style-image: url("chrome://global/skin/icons/plus.svg");
+}
+#appMenu-bookmarks-button {
+    order: 2 !important;
+    list-style-image: url("chrome://browser/skin/bookmark-star-on-tray.svg");
+}
+#appMenu-history-button {
+    order: 3 !important;
+    list-style-image: url("chrome://browser/skin/history.svg");
+}
+#appMenu-downloads-button {
+    order: 4 !important;
+    list-style-image: url("chrome://browser/skin/downloads/downloads.svg");
+}
+#appMenu-extensions-themes-button {
+    order: 5 !important;
+    list-style-image: url("chrome://mozapps/skin/extensions/extension.svg");
+}
+#appMenu-passwords-button {
+    order: 6 !important;
+    list-style-image: url("chrome://browser/skin/login.svg");
+}
+#appMenu-find-button2 {
+    order: 7 !important;
+    list-style-image: url("chrome://global/skin/icons/search-glass.svg");
+}
+#appMenu-zoom-controls {
+    order: 8 !important;
+}
+#appMenu-zoom-controls::before {
+    background-image: url("chrome://browser/skin/fullscreen.svg");
+}
+#appMenu-new-window-button2 {
+    order: 9 !important;
+    list-style-image: url("chrome://browser/skin/window.svg");
+}
+#appMenu-new-private-window-button2 {
+    order: 10 !important;
+    list-style-image: url("chrome://browser/skin/privateBrowsing.svg");
+}
+#appMenu-save-file-button2 {
+    order: 11 !important;
+    list-style-image: url("chrome://browser/skin/save.svg");
+}
+#appMenu-print-button2 {
+    order: 12 !important;
+    list-style-image: url("chrome://global/skin/icons/print.svg");
+}
+#appMenu-help-button2 {
+    order: 13 !important;
+    list-style-image: url("chrome://global/skin/icons/help.svg");
+}
+#appMenu-more-button2 {
+    order: 14 !important;
+    list-style-image: url("chrome://global/skin/icons/developer.svg");
+}
+#appMenu-settings-button {
+    order: 15 !important;
+    list-style-image: url("chrome://global/skin/icons/settings.svg");
+}
+#appMenu-quit-button2 {
+    order: 16 !important;
+    list-style-image: url("chrome://devtools/skin/images/search-clear.svg");
+}
+/* Use account-button icon for signed in sync item */
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before {
+    background-image: var(--avatar-image-url)
+}
+
+/* Show Tab Manager Menu button */
+#alltabs-button {
+    display: -moz-box !important;
+}
+
+/* Tab Manager Menu button tab counter */
+#TabsToolbar-customization-target {
+    counter-reset: tabCount;
+}
+.tabbrowser-tab {
+    counter-increment: tabCount;
+}
+#alltabs-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+    visibility: collapse !important;
+}
+#alltabs-button > .toolbarbutton-badge-stack {
+     position: relative !important;
+}
+#alltabs-button > .toolbarbutton-badge-stack::before {
+    content: counter(tabCount);
+    color: var(--toolbarbutton-icon-fill);
+    opacity: var(--toolbarbutton-icon-fill-opacity);
+    position: absolute;
+    bottom: var(--toolbarbutton-inner-padding);
+    left: 50%;
+    transform: translateX(-50%);
+}
+#alltabs-button > .toolbarbutton-badge-stack {
+    border-radius: var(--toolbarbutton-border-radius);
+}
+
+/* Tab Manager Menu tab counter */
+#allTabsMenu-allTabsViewTabs, /* before FF 106 */
+#allTabsMenu-allTabsView-tabs { /* since FF 106 */
+    counter-reset: nn_tabs 0 !important;
+}
+.all-tabs-button::before {
+    display: -moz-inline-box !important;
+    -moz-padding-end: 8px !important;
+    content: counter(nn_tabs) !important;
+    font-size: 12px !important;
+    margin-top: -2px !important;
+    margin-right: -2px !important;
+}
+.all-tabs-item {
+    counter-increment: nn_tabs !important;
+}
+
+/* Apply this customization only on smaller screens in landscape mode */
+@media (max-height: 300px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 3.5px;
+        --urlbar-width: calc(100vw - 188.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 4.5px;
+        --urlbar-width: calc(100vw - 196.5px);
+    }
+
+    /* Remove items from Main App Menu (≡) */
+    #appMenu-fxa-status2,
+    #appMenu-fxa-separator,
+    #appMenu-protonMainView toolbarseparator,
+    #appMenu-fullscreen-button2,
+    #appMenu-passwords-button,
+    .subviewbutton[shortcut]::after {
+        display: none !important;
+    }
+
+    /* Fix flickering of Main App Menu (≡) */
+    #appMenu-popup {
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        height: 253px !important;
+        max-height: 253px !important;
+        width: 250px !important;
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Hide Nav Bar when in Fullscreen mode */
+    #nav-bar[inFullscreen] {
+        display: none;
+    }
+
+    /* Move Nav Bar to bottom */
+    :root:not([uidensity="touch"],[inFullscreen]) {
+        --uc-bottom-toolbar-height: calc(39px + var(--toolbarbutton-outer-padding) )
+    }
+    :root[uidensity="touch"]:not([inFullscreen]){
+        --uc-bottom-toolbar-height: calc(43px + var(--toolbarbutton-outer-padding) )
+    }
+    #browser,
+    #customization-container {
+        margin-bottom: var(--uc-bottom-toolbar-height,0px)
+    }
+    #nav-bar{
+        position: fixed !important;
+        bottom: 0px;
+        width: 100%;
+        z-index: 1;
+    }
+    .panel-viewstack {
+        max-height: unset !important;
+    }
+
+    /* Edit Bookmark Panel */
+    #editBookmarkPanel {
+        background-color: var(--arrowpanel-background) !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
+    }
+    #editBookmarkPanel box.panel-header,
+    #editBookmarkHeaderSeparator,
+    #editBookmarkPanelInfoArea,
+    #editBookmarkSeparator,
+    #editBMPanel_folderRow,
+    #editBMPanel_tagsRow {
+        display: none !important;
+    }
+    #editBookmarkPanelContent {
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
+    }
+    #editBookmarkPanelBottomButtons {
+        margin-top: -5px !important;
+        margin-left: -50px !important;
+    }
+
+    /* Find Bar*/
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Remove items from Tab Manager Menu */
+    #allTabsMenu-searchTabs,
+    #allTabsMenu-tabsSeparator {
+        display: none;
+    }
+
+    /* Fix flickering of Tab Manager Menu and extension popups */
+    #customizationui-widget-panel,
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 35px) !important;
+        max-height: calc(100vh - 35px) !important;
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 207px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 8px !important;
+        font-weight: 600 !important;
+        font-family: "Noto Sans" !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Remove items from Unified Extensions Menu */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text in Unified Extensions Menu */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering of Unified Extensions Menu */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        width: 360px !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 230px !important;
+        max-height: 230px !important;
+        width: 350px !important;
+    }
+
+    /* Add padding to bottom of Unified Extensions Menu to look better */
+    #unified-extensions-area {
+        padding-bottom: 5px !important;
+    }
+
+    /* Allow extensions to use full display */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Adjust "Confirm before closing multiple tabs" popup */
+    .dialogFrame {
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+}
+
+/* Apply this customization only on smaller screens in portait mode */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --widget-overflow-margin: 22px;
+        --unified-extensions-panel-margin: 22px;
+        --customizationui-widget-panel-margin: 22px;
+        --appMenu-popup-margin: 22px;
+        --BMB_bookmarksPopup-margin: 22px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 3.5px;
+        --urlbar-width: calc(100vw - 110.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --widget-overflow-margin: 23px;
+        --unified-extensions-panel-margin: 23px;
+        --customizationui-widget-panel-margin: 23px;
+        --appMenu-popup-margin: 23px;
+        --BMB_bookmarksPopup-margin: 23px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 4.5px;
+        --urlbar-width: calc(100vw - 114.5px);
+    }
+
+    /* Main App Menu (≡) */
+    #appMenu-popup {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        height: 340px;
+        max-height: 340px;
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        margin-top: 4px !important;
+        height: 318px !important;
+        max-height: 318px !important;
+        width: 230px !important;
+    }
+    #appMenu-multiView box.panel-viewstack:first-child {
+        height: calc(100vh - 100px) !important;
+        max-height: calc(100vh - 100px) !important;
+    }
+    #appMenu-fxa-status2,
+    #appMenu-fxa-separator,
+    #appMenu-protonMainView toolbarseparator,
+    #appMenu-fullscreen-button2,
+    #appMenu-passwords-button,
+    .subviewbutton[shortcut]::after {
+        display: none !important;
+    }
+
+    /* Change Main App Menu (≡) button to its mobile equivalent (⋮) */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+        margin-right: -10px !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+        visibility: collapse !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack {
+        position: relative !important;
+        width: 75% !important;
+    }
+    #PanelUI-menu-button > .toolbarbutton-badge-stack::before {
+        content: "⋮";
+        color: var(--toolbarbutton-icon-fill);
+        opacity: var(--toolbarbutton-icon-fill-opacity);
+        position: absolute;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.9 );
+        left: 50%;
+        transform: translateX(-50%);
+        font-size: 18px !important;
+        font-weight: bold !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing Indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Hide Nav Bar when in Fullscreen mode */
+    #nav-bar[inFullscreen] {
+        display: none;
+    }
+
+    /* Move Nav Bar to bottom */
+    :root:not([uidensity="touch"],[inFullscreen]) {
+        --uc-bottom-toolbar-height: calc(39px + var(--toolbarbutton-outer-padding) )
+    }
+    :root[uidensity="touch"]:not([inFullscreen]){
+        --uc-bottom-toolbar-height: calc(43px + var(--toolbarbutton-outer-padding) )
+    }
+    #browser,
+    #customization-container {
+        margin-bottom: var(--uc-bottom-toolbar-height,0px)
+    }
+    #nav-bar{
+        position: fixed !important;
+        bottom: 0px;
+        width: 100%;
+        z-index: 1;
+    }
+    .panel-viewstack {
+        max-height: unset !important;
+    }
+
+    /* Adjust Widget Overflow Menu (») spawn height */
+    #widget-overflow {
+        margin-bottom: var(--widget-overflow-margin) !important;
+    }
+
+    /* Adjust Unified Extensions Menu spawn height */
+    #unified-extensions-panel {
+        margin-bottom: var(--unified-extensions-panel-margin) !important;
+    }
+
+    /* Adjust Tab Manager Menu spawn height */
+    #customizationui-widget-panel {
+        margin-bottom: var(--customizationui-widget-panel-margin) !important;
+    }
+
+    /* Adjust Main App Menu (≡) spawn height */
+    #appMenu-popup {
+        margin-bottom: var(--appMenu-popup-margin) !important;
+    }
+
+    /* Adjust Bookmarks Menu (★) spawn height */
+    #BMB_bookmarksPopup {
+        margin-bottom: var(--BMB_bookmarksPopup-margin) !important;
+    }
+
+    /* Edit Bookmark Panel */
+    #editBookmarkPanel {
+        background-color: var(--arrowpanel-background) !important;
+        margin-bottom: 225px !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
+    }
+    #editBookmarkPanel box.panel-header,
+    #editBookmarkHeaderSeparator,
+    #editBookmarkPanelInfoArea,
+    #editBookmarkSeparator,
+    #editBMPanel_folderRow,
+    #editBMPanel_tagsRow {
+        display: none !important;
+    }
+    #editBookmarkPanelContent {
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
+    }
+    #editBookmarkPanelBottomButtons {
+        margin-top: -5px !important;
+        margin-left: -50px !important;
+    }
+
+    /* Find Bar */
+    .findbar-container {
+        display: flex;
+        flex-direction: row;
+        flex-wrap: wrap;
+        height: 40px !important;
+    }
+    .findbar-textbox {
+        width: 100% !important;
+    }
+    .findbar-container checkbox {
+        padding: 10px 0px;
+    }
+    .findbar-highlight,
+    .findbar-case-sensitive,
+    .findbar-match-diacritics,
+    .findbar-entire-word,
+    /*.found-matches,*/
+    .findbar-find-status,
+    .find-status-icon {
+        display: none;
+    }
+    input.findbar-textbox {
+        font-size: 12pt !important;
+    }
+
+    /* Fix Popups */
+    #notification-popup {
+        margin-top: -500px !important;
+        margin-right: -500px !important;
+        height: calc(100vh - 250px) !important;
+        max-width: 100vw !important;
+    }
+    #downloadsPanel-mainView {
+        max-width: calc(100vw - 10px);
+    }
+    #backForwardMenu {
+        margin-top: -250px;
+        height: 200px;
+        min-height: 200px;
+        max-width: 100vw !important;
+    }
+    #context-inspect,
+    #context-inspect-a11y,
+    #context-savelinktopocket,
+    #context-searchselect,
+    #context-sendlinktodevice,
+    #context-viewpartialsource-selection,
+    #inspect-separator {
+        display: none !important
+    }
+    #protections-popup,
+    #permission-popup,
+    #widget-overflow,
+    #identity-popup {
+        max-width: 100vw !important;
+    }
+    #protections-popup-mainView {
+        min-width: 100vw !important;
+        max-width: 100vw !important;
+    }
+    #widget-overflow,
+    #widget-overflow-mainView {
+        height: calc(100vh - 80px) !important;
+    }
+    #customizationui-widget-panel {
+        width: 100vw !important;
+    }
+    #BMB_bookmarksPopup {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Tab Manager Menu */
+    #allTabsMenu-searchTabs,
+    #allTabsMenu-tabsSeparator {
+        display: none;
+    }
+    #customizationui-widget-panel {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+    }
+    #allTabsMenu-multiView box.panel-viewstack {
+        height: calc(100vh - 100px) !important;
+        max-height: calc(100vh - 100px) !important;
+    }
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: 330px !important;
+        max-height: 330px !important;
+    }
+    #allTabsMenu-allTabsViewTabs,
+    #allTabsMenu-allTabsView-tabs {
+        max-width: calc(100vw - 30px);
+        padding-top: 2px !important;
+    }
+
+    /* Tab Manager Menu inspired by Firefox for Android */
+    #allTabsMenu-containerTabsButton {
+        border-radius: 0 !important;
+        margin: 0 !important;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-item {
+        border-radius: 0 !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(100vw - 30px) !important;
+    }
+    .all-tabs-close-button {
+        border-radius: 100% !important;
+        margin-left: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        margin-right: calc(var(--urlbar-min-height) * -0.6 ) !important;
+        height: calc(var(--urlbar-min-height) * 2.25 ) !important;
+        width: calc(var(--urlbar-min-height) * 2.25 ) !important;
+    }
+    .all-tabs-close-button > .toolbarbutton-icon {
+        margin-left: calc(var(--urlbar-min-height) * 0.625 ) !important;
+        height: calc(var(--urlbar-min-height) * 0.5 ) !important;
+        width: calc(var(--urlbar-min-height) * 0.5 ) !important;
+    }
+
+    /* Tab Manager Menu button inspired by Firefox for Android */
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        border: 1px solid var(--toolbarbutton-icon-fill);
+        border-radius: 2px;
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.85 ) !important;
+        padding: 0 5px 0 5px;
+        font-size: 8px !important;
+        font-weight: 600 !important;
+        font-family: "Noto Sans" !important;
+    }
+
+    /* Move Tab Manager Menu button to right of urlbar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 28.5px;
+        z-index: 2 !important;
+    }
+
+    /* Nav Bar */
+    #back-button,
+    #forward-button,
+    #customizableui-special-spring1,
+    #customizableui-special-spring2,
+    #library-button,
+    #sidebar-button,
+    #fxa-toolbar-menu-button {
+        display: none !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* URL Bar */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+    #urlbar {
+        padding: 0px 5px;
+    }
+    #urlbar-input {
+        font-size: 10pt !important;
+    }
+    #urlbar[focused] #urlbar-input {
+        font-size: calc(var(--urlbar-height) - 9px) !important;
+    }
+    #urlbar[focused] #remote-control-box,
+    #urlbar[focused] #identity-box,
+    #urlbar[focused] #tracking-protection-icon-container,
+    #urlbar[focused] #reader-mode-button,
+    #urlbar[focused] #page-action-buttons,
+    #tracking-protection-icon-container,
+    #identity-permission-box,
+    #userContext-indicator,
+    #pageActionButton {
+        display: none;
+    }
+    #identity-icon-label {
+        display: none;
+    }
+    .urlbarView {
+        position: fixed !important;
+        inset: 0px 0px 84px 0px;
+        width: 100% !important;
+        background: var(--arrowpanel-background);
+        margin: 0px !important;
+        margin-inline: 0px !important;
+        border-inline: 0px !important;
+        overflow-y:  auto !important;
+        overflow-x: none !important;
+        scrollbar-width: none;
+    }
+    #PersonalToolbar {
+        display: none;
+    }
+    :root {
+        --bookmarks-toolbar-overlapping-browser-height: 0 !important;
+    }
+    #urlbar,
+    #searchbar,
+    #urlbar-input,
+    #urlbar-input-container,
+    #urlbar-background {
+        border-radius: 7px !important;
+    }
+
+    /* Remove items from Unified Extensions Menu */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text in Unified Extensions Menu */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering for Unified Extensions Menu */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: 100vw !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 325px !important;
+        max-height: 325px !important;
+        width: calc(100vw - 30px) !important;
+    }
+
+    /* Allow extensions to use full popup */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: calc(100vw - 20px) !important;
+        min-width: calc(100vw - 20px) !important;
+    }
+
+    /* Change Unified Extensions Menu button icon to Home button icon */
+    #unified-extensions-button {
+        list-style-image: url("chrome://browser/skin/home.svg") !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Adjust "Confirm before closing multiple tabs" popup */
+    .dialogFrame {
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 120px !important;
+    }
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 64px !important;
+    }
+
+}

src/userChrome/findbar.css

@@ -6,7 +6,8 @@
         display: flex;
         flex-direction: row;
         flex-wrap: wrap;
-        height: 150px !important;
+        /*height: 150px !important;*/
+        height: 40px !important;
     }
 
     .findbar-textbox {
@@ -19,4 +20,16 @@
          * them with the finger. */
         padding: 10px 0px;
     }
+
+    /* Save space */
+    .findbar-highlight,
+    .findbar-case-sensitive,
+    .findbar-match-diacritics,
+    .findbar-entire-word,
+    /*.found-matches,*/
+    .findbar-find-status,
+    .find-status-icon {
+        display: none;
+    }
+
 }

src/userChrome/glow.css

@@ -0,0 +1,44 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Inactive tab glow on hover */
+.tabbrowser-tab:hover > .tab-stack > .tab-background:not([selected]) {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+}
+
+/* Newtab buttons (+) and Tab Manager button (v) glow on hover */
+#alltabs-button:hover > .toolbarbutton-badge-stack,
+#new-tab-button:hover,
+#tabs-newtab-button:hover {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+}
+
+/* Back button glow on hover */
+#back-button:not([disabled]):hover > .toolbarbutton-icon {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+}
+
+/* Forward button glow on hover */
+#forward-button:not([disabled]):hover > .toolbarbutton-icon {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+}
+
+/* Urlbar glow */
+#urlbar {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+}
+/* Urlbar glow on focus */
+#urlbar[focused] {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+    box-shadow: 0 0 3px var(--uc-icon-glow-secondary) !important;
+}
+/* Urlbar glow on hover */
+#urlbar:hover {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+    box-shadow: 0 0 3px var(--uc-icon-glow-secondary) !important;
+}
+
+/* Navbar buttons glow */
+#nav-bar toolbarbutton:hover:not(#back-button):not(#forward-button) {
+    filter: drop-shadow(0 0 2px var(--uc-icon-glow-secondary)) drop-shadow(0 0 1px var(--uc-icon-glow-primary));
+}

src/userChrome/hide_newtab_+_new-tab_buttons.css

@@ -0,0 +1,13 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Hide Newtab and New-tab buttons */
+    #new-tab-button,
+    #tabs-newtab-button {
+        display: none !important;
+    }
+
+}

src/userChrome/hide_tab_counter.css

@@ -0,0 +1,12 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Remove Tab Manager button */
+    #alltabs-button {
+        display: none !important;
+    }
+
+}

src/userChrome/hide_tabs_scrollbuttons.css

@@ -3,63 +3,65 @@ See the above repository for updates as well as full license text. */
 
 /* This should hide tabs scrollbuttons in a manner that preserves the ability to move tab strip when reordering tabs */
 
-#tabbrowser-arrowscrollbox{
+#tabbrowser-arrowscrollbox {
-  --uc-compat-scrollbutton-margin: 1px; /* compatibility for non_floating_sharp_tabs.css */
+    --uc-compat-scrollbutton-margin: 1px; /* compatibility for non_floating_sharp_tabs.css */
-  --uc-scrollbutton-up-background: linear-gradient(-90deg,transparent,var(--lwt-accent-color) 35%);
+    --uc-scrollbutton-up-background: linear-gradient(-90deg,transparent,var(--lwt-accent-color) 35%);
-  --uc-scrollbutton-down-background: linear-gradient(90deg,transparent,var(--lwt-accent-color) 35%);
+    --uc-scrollbutton-down-background: linear-gradient(90deg,transparent,var(--lwt-accent-color) 35%);
 }
 
-#tabbrowser-tabs:not([movingtab]){
+#tabbrowser-tabs:not([movingtab]) {
-  --uc-scroll-visibility: hidden;
+    --uc-scroll-visibility: hidden;
 }
-#tabbrowser-tabs[overflow]{
+#tabbrowser-tabs[overflow] {
-  --uc-scrollbox-base-margin: -31px;
+    --uc-scrollbox-base-margin: -31px;
-  --uc-scrollbox-margin: calc(var(--uc-scrollbox-base-margin) + var(--tab-shadow-max-size));
+    --uc-scrollbox-margin: calc(var(--uc-scrollbox-base-margin) + var(--tab-shadow-max-size));
 }
-:root[uidensity="compact"] #tabbrowser-tabs[overflow]{
+:root[uidensity="compact"] #tabbrowser-tabs[overflow] {
-  --uc-scrollbox-base-margin: -25px;
+    --uc-scrollbox-base-margin: -25px;
 }
-#tabbrowser-arrowscrollbox:not([scrolledtostart="true"]){
+#tabbrowser-arrowscrollbox:not([scrolledtostart="true"]) {
-  --uc-scrollbox-overflow-start-margin: -1px;
+    --uc-scrollbox-overflow-start-margin: -1px;
 }
-#scrollbutton-up ~ spacer{
+#scrollbutton-up ~ spacer {
-  visibility: visible !important;
+    visibility: visible !important;
 }
-spacer[part="overflow-start-indicator"]{
+spacer[part="overflow-start-indicator"] {
-  -moz-box-ordinal-group: 0; /* Fx < 112 compatibility */
+    -moz-box-ordinal-group: 0; /* Fx < 112 compatibility */
-  order: -1;
+    order: -1;
-  margin-inline-start: var(--uc-scrollbox-overflow-start-margin,-0.5px) !important;
+    margin-inline-start: var(--uc-scrollbox-overflow-start-margin,-0.5px) !important;
 }
-spacer[part="overflow-end-indicator"]{
+spacer[part="overflow-end-indicator"] {
-  -moz-box-ordinal-group: 2; /* Fx < 112 compatibility */
+    -moz-box-ordinal-group: 2; /* Fx < 112 compatibility */
-  order: 2;
+    order: 2;
 }
 
 #scrollbutton-down[disabled="true"] > .toolbarbutton-icon,
-#scrollbutton-up[disabled="true"] > .toolbarbutton-icon{
+#scrollbutton-up[disabled="true"] > .toolbarbutton-icon {
-  opacity: 0.4;
+    opacity: 0.4;
-} 
+}
 #scrollbutton-up,
-#scrollbutton-down{
+#scrollbutton-down {
-  position: relative;
+    position: relative;
-  z-index: 1;
+    z-index: 1;
-  visibility: var(--uc-scroll-visibility,visible);
+    visibility: var(--uc-scroll-visibility,visible);
-  background-clip: border-box !important;
+    background-clip: border-box !important;
-  background-origin: initial !important;
+    background-origin: initial !important;
-  background-repeat: no-repeat !important;
+    background-repeat: no-repeat !important;
-  opacity: 1 !important;
+    opacity: 1 !important;
 }
-#scrollbutton-up{
+#scrollbutton-up {
-  margin-inline-start: calc(0px - var(--tab-shadow-max-size,0px)) !important;
+    margin-inline-start: calc(0px - var(--tab-shadow-max-size,0px)) !important;
-  background-image: var(--uc-scrollbutton-up-background);
+    background-image: var(--uc-scrollbutton-up-background);
 }
-#scrollbutton-down{
+#scrollbutton-down {
-  margin-inline-end: calc(0px - var(--tab-shadow-max-size,0px)) !important;
+    margin-inline-end: calc(0px - var(--tab-shadow-max-size,0px)) !important;
-  background-image: var(--uc-scrollbutton-down-background);
+    background-image: var(--uc-scrollbutton-down-background);
+}
+.scrollbox-clip {
+    margin-inline: var(--uc-scrollbox-margin,0px);
 }
-.scrollbox-clip{ margin-inline: var(--uc-scrollbox-margin,0px); }
 
 /* Need to reset some things for other scrollboxes */
-.menupopup-arrowscrollbox{
+.menupopup-arrowscrollbox {
-  --tab-shadow-max-size: 0;
+    --tab-shadow-max-size: 0;
 }

src/userChrome/iconized_main_menu.css

@@ -2,12 +2,20 @@
 See the above repository for updates as well as full license text. */
 
 /* Adds icons to main menu items which were removed in Proton */
+#appMenu-zoom-controls::before,
 #appMenu-fxa-status2[fxastatus] > toolbarbutton::before,
 #appMenu-protonMainView > .panel-subview-body > toolbarbutton > image{
   fill: currentColor;
   -moz-context-properties: fill;
   margin-inline: 0 8px !important;
 }
+#appMenu-zoom-controls::before,
+#appMenu-fxa-status2[fxastatus] > toolbarbutton::before{
+  display: flex;
+  content: "";
+  width: 16px;
+  height: 16px;
+}
 #appMenu-new-tab-button2{ list-style-image: url("chrome://browser/skin/new-tab.svg") }
 #appMenu-new-window-button2{ list-style-image: url("chrome://browser/skin/window.svg") }
 #appMenu-new-private-window-button2{ list-style-image: url("chrome://browser/skin/privateBrowsing.svg") }
@@ -23,23 +31,17 @@ See the above repository for updates as well as full license text. */
 #appMenu-more-button2{ list-style-image: url("chrome://global/skin/icons/developer.svg") }
 #appMenu-help-button2{ list-style-image: url("chrome://global/skin/icons/info.svg") }
 #appMenu-quit-button2{ list-style-image: url("chrome://devtools/skin/images/search-clear.svg") }
+#appMenu-translate-button{ list-style-image: url("chrome://browser/skin/translations.svg") }
+#appMenu-zoom-controls::before{ background-image: url("chrome://browser/skin/fullscreen.svg") }
 /* Use account-button icon for signed in sync item */
-#appMenu-fxa-status2[fxastatus] > toolbarbutton::before{
+/*#appMenu-fxa-status2[fxastatus] > toolbarbutton::before{ background-image: var(--avatar-image-url) }*/
-  display: flex;
-  content: "";
-  width: 16px;
-  height: 16px;
-  background-image: var(--avatar-image-url)
-}
 /* Add somewhat hacky separator to zoom controls so it looks consistent */
-#appMenu-protonMainView > .panel-subview-body::after{
+/*#appMenu-protonMainView > .panel-subview-body::after{
   content: "";
   display: flex;
   border-bottom: 1px solid var(--panel-separator-color);
   margin: var(--panel-separator-margin);
 }
-
 #appMenu-find-button2 ~ *{
-  -moz-box-ordinal-group: 2; /* Fx < 112 compatibility */
   order: 2;
-}
+}*/

src/userChrome/new-tab-button.css

@@ -0,0 +1,18 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Hide non-overflow Newtab button */
+    #tabs-newtab-button {
+        display: none !important;
+    }
+
+    /* Display overflow New-tab button by default and fix alignment */
+    #new-tab-button {
+        display: initial !important;
+        margin-top: 4px !important;
+    }
+
+}

src/userChrome/numbered_tabs.css

@@ -1,7 +1,51 @@
 /* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/numbered_tabs.css made available under Mozilla Public License v. 2.0
 See the above repository for updates as well as full license text. */
 
-/* Show a number before tab text*/
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
 
-.tabbrowser-tab:first-child{ counter-reset: nth-tab 0 } /* Change to -1 for 0-indexing */
+    /* Density variables */
-.tab-text::before{ content: counter(nth-tab) " "; counter-increment: nth-tab }
+    :root:not([uidensity="touch"]) {
+        --tab-number-position: calc(var(--toolbarbutton-inner-padding) * 1.6 );
+    }
+    :root[uidensity="touch"] {
+        --tab-number-position: calc(var(--toolbarbutton-inner-padding) * 1.8 );
+    }
+
+    /* Show the tab number after tab content, right-align it, and fix its position directly on the tab close button */
+    #tabbrowser-tabs {
+        counter-reset: nth-tab 0; /* Change to -1 for 0-indexing */
+    }
+    .tabbrowser-tab .tab-content::after {
+        content: counter(nth-tab) " ";
+        counter-increment: nth-tab;
+        position: absolute !important;
+        position: fixed;
+        right: 24px;
+        bottom: var(--tab-number-position);
+        width: 0 !important;
+    }
+
+    /* Hide tab close button on unpinned tabs, and reserve space for tab number */
+    .tabbrowser-tab:not(:hover,[pinned]) .tab-close-button {
+        display: initial !important;
+        visibility: hidden !important;
+    }
+
+    /* Hide tab number on pinned tabs and when hovering on unpinned tabs so that tab close button is clickable */
+    .tabbrowser-tab[pinned] .tab-content::after,
+    .tabbrowser-tab:not([pinned]):hover .tab-content::after {
+        visibility: hidden !important;
+    }
+
+    /* Adjust tab close button opacity, border, and shape */
+    .tab-close-button {
+        position: absolute !important;
+        margin-right: -8px !important;
+        opacity: 0.5 !important;
+        border: 2px solid white !important;
+        height: 36px !important;
+        width: 36px !important;
+    }
+
+}

src/userChrome/popups.before-ff-108.css

@@ -1,15 +0,0 @@
-/* Copyright 2022 Oliver Smith
- * SPDX-License-Identifier: MPL-2.0 */
-
-@media (max-width: 700px) {
-    /* Hack to prevent popups from flickering around. It looks like e.g. the
-     * editBookmarkPanel has two heights otherwise, and draws one frame with a
-     * short height and one frame with the proper one. */
-    #mainPopupSet {
-        position: fixed !important;
-        top: 0px;
-        left: 0px;
-        right: 0px;
-        bottom: 100px;
-    }
-}

src/userChrome/popups.css

@@ -6,8 +6,11 @@
      * the notifications (like the one for installing addons) displayed
      * on-screen. */
     #notification-popup {
-        margin-left: -200px !important;
+        /*margin-left: -200px !important;*/
         margin-top: -500px !important;
+        margin-right: -500px !important;
+        height: calc(100vh - 250px) !important;
+        max-width: 100vw !important;
     }
 
     #downloadsPanel-mainView {
@@ -42,7 +45,7 @@
         max-width: 100vw !important;
     }
 
-    /* fix the protections popup gettting
+    /* fix the protections popup getting
      * too wide, making controls unaccessible */
     #protections-popup-mainView {
         min-width: 100vw !important;
@@ -57,4 +60,29 @@
     #widget-overflow-mainView {
         height: calc(100vh - 80px) !important;
     }
+
+    /* Adjust Tab Manager Menu to fix flickering */
+    #customizationui-widget-panel {
+        width: 100vw !important;
+    }
+
+    /* Adjust Bookmarks Menu (★) and fix flickering */
+    #BMB_bookmarksPopup {
+        padding-left: 10px !important;
+        padding-right: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+    /* Adjust "Confirm before closing multiple tabs" popup */
+    .dialogFrame {
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
 }

src/userChrome/round_ui_items.css

@@ -3,10 +3,13 @@ See the above repository for updates as well as full license text. */
 
 /* Make bunch of things in the main UI round */
 
-:root{ --toolbarbutton-border-radius: 24px !important }
+:root {
+    --toolbarbutton-border-radius: 12px !important;
+    --tab-border-radius: 14px !important;
+}
 #urlbar-input-container > box:hover,
 #urlbar-input-container > box[open],
-#main-menubar >  menu,
+#main-menubar >    menu,
 .titlebar-button:hover,
 #scrollbutton-up,
 #scrollbutton-down,
@@ -19,29 +22,74 @@ See the above repository for updates as well as full license text. */
 .subviewbutton-back,
 .toolbaritem-combined-buttons > toolbarbutton,
 #PopupSearchAutoComplete,
-menupopup{ border-radius: 18px }
+menupopup {
+    border-radius: 10px;
+}
 
 button,
-.tab-background{ border-radius: 30px !important; }
+.tab-background {
+    border-radius: 14px !important;
+}
 
-.panel-arrowcontent{ margin-inline-end: 0 !important; }
+.panel-arrowcontent {
-.panel-arrow{ margin-inline: 17px !important; }
+    margin-inline-end: 0 !important;
+}
+.panel-arrow {
+    margin-inline: 17px !important;
+}
 
-menupopup{ -moz-appearance: none !important; overflow: -moz-hidden-unscrollable !important; }
+menupopup {
+    -moz-appearance: none !important;
+    overflow: -moz-hidden-unscrollable !important;
+}
 
 .tabbrowser-tab[selected]::after,
-.tabbrowser-tab[beforeselected-visible]::after{ border-color: transparent !important; }
+.tabbrowser-tab[beforeselected-visible]::after {
-
+    border-color: transparent !important;
-#nav-bar{ box-shadow: none !important; margin-top: 3px }
-.tab-line{ display: none }
-
-.tab-background[selected]{
-  border-top-width: 2px !important;
-  border-top-color: var(--lwt-tab-line-color) !important;
 }
-.tabbrowser-tab[selected]{ z-index: auto !important; }
 
-.urlbar-icon,
+/*#nav-bar {
-toolbar toolbarbutton:not(#back-button):not(.bookmark-item):not(.titlebar-button) > .toolbarbutton-icon{  border-radius: 0px !important; clip-path: circle() }
+    box-shadow: none !important;
+    margin-top: 3px;
+}*/
+.tab-line {
+    display: none;
+}
 
-menugroup:hover > menuitem{ clip-path: circle() }
+.tab-background[selected] {
+    border-top-width: 3px !important;
+    border-bottom-width: 3px !important;
+    border-left-width: 3px !important;
+    border-right-width: 3px !important;
+    border-radius: 14px !important;
+}
+.tabbrowser-tab[selected] {
+    z-index: auto !important;
+}
+
+/*.urlbar-icon,
+toolbar toolbarbutton:not(#back-button):not(.bookmark-item):not(.titlebar-button) > .toolbarbutton-icon {
+    border-radius: 12px !important;
+}*/
+
+menugroup:hover > menuitem {
+    border-radius: 16px !important;
+}
+
+/* URL Bar and Search Bar shape */
+#urlbar,
+#searchbar,
+#urlbar-input,
+#urlbar-input-container {
+    border-radius: 12px !important;
+}
+#urlbar-background {
+    border: none !important;
+    border-radius: 12px !important;
+}
+
+/* Find Bar shape */
+input.findbar-textbox {
+    border-radius: 9px !important;
+    font-size: 14px !important;
+}

src/userChrome/single_tab_mode-alt.css

@@ -0,0 +1,98 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 48px;
+        --alltabs-number-position: calc(var(--toolbarbutton-inner-padding) * 1.5 );
+        --urlbar-width: calc(100vw - 166px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 54px;
+        --alltabs-number-position: calc(var(--toolbarbutton-inner-padding) * 1.5 );
+        --urlbar-width: calc(100vw - 171.5px);
+    }
+
+    /* Hide Nav Bar and Tab Bar when in Fullscreen mode and hide Title Bar, Newtab button, and New-tab button */
+    #nav-bar[inFullscreen],
+    #TabsToolbar[inFullscreen],
+    .titlebar-buttonbox-container,
+    #new-tab-button,
+    #tabs-newtab-button {
+        display: none !important;
+    }
+
+    /* Hide unpinned inactive tabs */
+    .tabbrowser-tab:not([pinned]):not([selected]) {
+        visibility: collapse !important;
+        min-width: 0 !important;
+    }
+
+    /* Expand unpinned active tab */
+    #tabbrowser-tabs:not([haspinnedtabs]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab[selected] {
+        min-width: 100vw !important;
+    }
+    #tabbrowser-tabs[haspinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab:not([pinned])[selected] {
+        min-width: calc(100vw - 40px) !important;
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+}

src/userChrome/single_tab_mode.css

@@ -0,0 +1,98 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 4.5px;
+        --alltabs-number-position: calc(var(--toolbarbutton-inner-padding) * 1.5 );
+        --urlbar-width: calc(100vw - 166px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 5.5px;
+        --alltabs-number-position: calc(var(--toolbarbutton-inner-padding) * 1.5 );
+        --urlbar-width: calc(100vw - 171.5px);
+    }
+
+    /* Hide Nav Bar and Tab Bar when in Fullscreen mode and hide Title Bar, Newtab button, and New-tab button */
+    #nav-bar[inFullscreen],
+    #TabsToolbar[inFullscreen],
+    .titlebar-buttonbox-container,
+    #new-tab-button,
+    #tabs-newtab-button {
+        display: none !important;
+    }
+
+    /* Hide unpinned inactive tabs */
+    .tabbrowser-tab:not([pinned]):not([selected]) {
+        visibility: collapse !important;
+        min-width: 0 !important;
+    }
+
+    /* Expand unpinned active tab */
+    #tabbrowser-tabs:not([haspinnedtabs]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab[selected] {
+        min-width: 100vw !important;
+    }
+    #tabbrowser-tabs[haspinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab:not([pinned])[selected] {
+        min-width: calc(100vw - 40px) !important;
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+}

src/userChrome/tab_animated_active_border.css

@@ -3,30 +3,37 @@ See the above repository for updates as well as full license text. */
 
 /* Creates a colorful animated border around active tab */
 
-@keyframes filter{from{ filter: hue-rotate(0deg) } to { filter: hue-rotate(360deg) }}
+@keyframes filter {
- 
+    from {
-.tabbrowser-tab[selected] > .tab-stack::before{
+        filter: hue-rotate(0deg)
-  grid-area: 1/1;
+    }
-  content: "";
+    to {
-  display: inherit;
+        filter: hue-rotate(360deg)
-  margin-block: var(--tab-block-margin);
+    }
-  border-radius: var(--tab-border-radius);
+}
-  z-index: 0;
+
-  background-image: conic-gradient(
+.tabbrowser-tab[selected] > .tab-stack::before {
-    hsl(0 100% 70%),
+    grid-area: 1/1;
-    hsl(60 100% 45%) 70deg,
+    content: "";
-    hsl(120 100% 55%) 105deg,
+    display: inherit;
-    hsl(160 100% 60%) 160deg,
+    margin-block: var(--tab-block-margin);
-    hsl(200 100% 60%) 200deg,
+    border-radius: var(--tab-border-radius);
-    hsl(240 100% 65%) 255deg,
+    z-index: 0;
-    hsl(300 100% 60%) 290deg,
+    background-image: conic-gradient(
-    hsl(360 100% 70%) 360deg);
+        hsl(0 100% 70%),
-  background-size: cover;
+        hsl(60 100% 45%) 70deg,
-  background-position: center;
+        hsl(120 100% 55%) 105deg,
-  animation: filter steps(30) 2s infinite;
+        hsl(160 100% 60%) 160deg,
+        hsl(200 100% 60%) 200deg,
+        hsl(240 100% 65%) 255deg,
+        hsl(300 100% 60%) 290deg,
+        hsl(360 100% 70%) 360deg);
+    background-size: cover;
+    background-position: center;
+    animation: filter steps(30) 2s infinite;
+}
+.tab-background[selected] {
+    border: 1px solid transparent !important;
+    outline: none !important;
+    background-clip: padding-box !important;
 }
-.tab-background[selected]{
-  border: 1px solid transparent !important;
-  outline: none !important;
-  background-clip: padding-box !important;
-}

src/userChrome/tab_close_button_always_on_hover.css

@@ -2,10 +2,10 @@
 See the above repository for updates as well as full license text. */
 
 /* Always show tab close button on hover and never otherwise */
-.tabbrowser-tab .tab-close-button{
+.tabbrowser-tab .tab-close-button {
-  display:none;
+    display: none;
+}
+.tabbrowser-tab:not([pinned]):hover .tab-close-button {
+    display: flex !important;
+    align-items: center;
 }
-.tabbrowser-tab:not([pinned]):hover .tab-close-button{
-  display: flex !important;
-  align-items: center;
-}

src/userChrome/tab_counter.css

@@ -0,0 +1,54 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source from reddit users /u/BatDogOnBatMobile, /u/moko1960, and /u/It_Was_The_Other_Guy
+     https://teddit.net/r/FirefoxCSS/comments/s4wsww/
+     https://teddit.net/r/FirefoxCSS/comments/yb8tr9/ */
+
+/* Show Tab Manager Menu button */
+#alltabs-button {
+    display: -moz-box !important;
+}
+
+/* Tab Manager Menu button tab counter */
+#TabsToolbar-customization-target {
+    counter-reset: tabCount;
+}
+.tabbrowser-tab {
+    counter-increment: tabCount;
+}
+#alltabs-button > .toolbarbutton-badge-stack > .toolbarbutton-icon {
+    visibility: collapse !important;
+}
+#alltabs-button > .toolbarbutton-badge-stack {
+     position: relative !important;
+}
+#alltabs-button > .toolbarbutton-badge-stack::before {
+    content: counter(tabCount);
+    color: var(--toolbarbutton-icon-fill);
+    opacity: var(--toolbarbutton-icon-fill-opacity);
+    position: absolute;
+    bottom: var(--toolbarbutton-inner-padding);
+    left: 50%;
+    transform: translateX(-50%);
+}
+#alltabs-button > .toolbarbutton-badge-stack {
+    border-radius: var(--toolbarbutton-border-radius);
+}
+
+/* Tab Manager Menu tab counter */
+#allTabsMenu-allTabsViewTabs, /* before FF 106 */
+#allTabsMenu-allTabsView-tabs { /* since FF 106 */
+    counter-reset: nn_tabs 0 !important;
+}
+.all-tabs-button::before {
+    display: -moz-inline-box !important;
+    -moz-padding-end: 8px !important;
+    content: counter(nn_tabs) !important;
+    font-size: 12px !important;
+    margin-top: -2px !important;
+    margin-right: -2px !important;
+}
+.all-tabs-item {
+    counter-increment: nn_tabs !important;
+}

src/userChrome/tabmenu.css

@@ -6,7 +6,7 @@
      * the tab bar for the private-browsing-indicator (that mask icon). This
      * gives the tab bar a consistent width in both the regular and the private
      * browsing mode, so the increased width hack below looks good in both. */
-    #titlebar {
+    /*#titlebar {
         padding-right: 30px;
     }
     hbox.private-browsing-indicator {
@@ -14,24 +14,25 @@
         right: 0px;
         bottom: 50px;
         display: block;
-    }
+    }*/
 
     /* Increase tab width, to have more space for displaying the title of the
      * website and to make the "all tabs" button show up. */
-    #tabbrowser-tabs {
+    /*#tabbrowser-tabs {
         --tab-min-width: calc(100vw - 116px) !important;
-    }
+    }*/
 
     /* Rotate the arrow on the "all tabs" button to point upwards, since the
      * tabs and searchbar were moved to the bottom. */
-    #alltabs-button {
+    /*#alltabs-button {
         transform: rotate(180deg) !important;
-    }
+    }*/
 
     /* All tabs menu: hide scroll buttons */
-    #scrollbutton-up, #scrollbutton-down {
+    /*#scrollbutton-up,
+    #scrollbutton-down {
         display: none !important;
-    }
+    }*/
 
     /* All tabs menu: hide the search and the separator below it. */
     #allTabsMenu-searchTabs,
@@ -45,36 +46,50 @@
         /* Further up than appmenu, because the "all tabs" button that spawns
          * this menu is above the hamburger button that spawns the regular
          * menu. */
-        margin-top: -360px !important;
+        /*margin-top: -360px !important;*/
-        height: 320px;
+        padding-left: 10px !important;
-        max-height: 320px;
+        padding-right: 10px !important;
+        /*height: 320px;*/
+        /*max-height: 320px;*/
     }
 
-    #allTabsMenu-allTabsView vbox.panel-subview-body {
+    /*#allTabsMenu-allTabsView vbox.panel-subview-body {
         /* Use the whole height */
-        height: 300px !important;
+        /*height: 300px !important;
-        max-height: 300px !important;
+        /*max-height: 300px !important;
         /* When messing around with tabs, it gets into a state where it does
          * not use the whole height anymore, it becomes a tiny window. Removing
-         * this attribute fixes it. */
+         * this attribute fixes it. Since FF 113, this no longer has any
-        -moz-box-flex: initial !important;
+         * effect, but it doesn't seem to be necessary either. */
-    }
+        /*-moz-box-flex: initial !important;
+    }*/
 
-    #allTabsMenu-allTabsView vbox.panel-subview-body:first-child {
+    /*#allTabsMenu-allTabsView vbox.panel-subview-body:first-child {
         /* the allTabsMenu has a vbox.panel-subview-body inside another one.
          * With -moz-box-flex: initial, it will show a scroll bar in each, but
          * we only want one scrollbar. */
-        overflow-y: hidden !important;
+        /*overflow-y: hidden !important;
-    }
+    }*/
 
-    #allTabsMenu-multiView box.panel-viewstack {
+    #allTabsMenu-multiView box.panel-viewstack { /* before FF 102 or earlier */
         /* Use the whole height */
         height: calc(100vh - 100px) !important;
         max-height: calc(100vh - 100px) !important;
     }
+    #customizationui-widget-multiview box.panel-viewstack { /* since FF 113 */
+        /* Use the whole height */
+        /*height: 300px !important;
+        max-height: 300px !important;*/
+        height: 330px !important;
+        max-height: 330px !important;
+    }
 
-    #allTabsMenu-allTabsViewTabs {
+    #allTabsMenu-allTabsViewTabs, /* before FF 106 */
+    #allTabsMenu-allTabsView-tabs { /* since FF 106 */
         /* Make sure tabs with long titles don't exceed the all tabs menu */
-        max-width: calc(100vw - 20px);
+        /*max-width: calc(100vw - 20px);*/
+        max-width: calc(100vw - 30px);
+        /* Fix padding */
+        padding-top: 2px !important;
     }
 }

src/userChrome/tabs_fill_available_width.css

@@ -1,5 +1,12 @@
 /* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/tabs_fill_available_width.css made available under Mozilla Public License v. 2.0
 See the above repository for updates as well as full license text. */
 
-/* Why 100vw? Tab closing requires width animation to end and "none" can't be animated */
+/* Apply this customization only on smaller screens */
-.tabbrowser-tab[fadein]:not([style^="max-width"]){ max-width: 100vw !important }
+@media (max-width: 700px) {
+
+    /* Why 100vw? Tab closing requires width animation to end and "none" can't be animated */
+    .tabbrowser-tab[fadein]:not([style^="max-width"]) {
+        max-width: 100vw !important;
+    }
+
+}

src/userChrome/tabs_larger_min-width.css

@@ -0,0 +1,7 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Tab min-width resizing */
+#tabbrowser-tabs {
+    --tab-min-width: 24vw !important;
+}

src/userChrome/true_mobile_landscape-alt.css

@@ -0,0 +1,204 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens in landscape mode */
+@media (max-height: 300px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 4px;
+        --urlbar-width: calc(100vw - 205.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 5px;
+        --urlbar-width: calc(100vw - 209.5px);
+    }
+
+    /* Remove items from Main App Menu (≡) */
+    #appMenu-fxa-status2,
+    #appMenu-fxa-separator,
+    #appMenu-protonMainView toolbarseparator,
+    #appMenu-fullscreen-button2,
+    #appMenu-passwords-button,
+    .subviewbutton[shortcut]::after {
+        display: none !important;
+    }
+
+    /* Remove extra space above zoom controls in Main App Menu (≡) */
+    #appMenu-zoom-controls {
+        margin-top: 0 !important;
+    }
+
+    /* Fix flickering of Main App Menu (≡) */
+    #appMenu-popup {
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        height: 253px !important;
+        max-height: 253px !important;
+        width: 250px !important;
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Edit Bookmark Panel */
+    #editBookmarkPanel {
+        background-color: var(--arrowpanel-background) !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
+    }
+    #editBookmarkPanel box.panel-header,
+    #editBookmarkHeaderSeparator,
+    #editBookmarkPanelInfoArea,
+    #editBookmarkSeparator,
+    #editBMPanel_folderRow,
+    #editBMPanel_tagsRow {
+        display: none !important;
+    }
+    #editBookmarkPanelContent {
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
+    }
+    #editBookmarkPanelBottomButtons {
+        margin-top: -5px !important;
+        margin-left: -50px !important;
+    }
+
+    /* Remove items from Tab Manager Menu */
+    #allTabsMenu-searchTabs,
+    #allTabsMenu-tabsSeparator {
+        display: none;
+    }
+
+    /* Fix flickering of Tab Manager Menu and extension popups */
+    #customizationui-widget-panel,
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 35px) !important;
+        max-height: calc(100vh - 35px) !important;
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+    /* Remove items from Unified Extensions Menu */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text in Unified Extensions Menu */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering of Unified Extensions Menu */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        width: 360px !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 230px !important;
+        max-height: 230px !important;
+        width: 350px !important;
+    }
+
+    /* Add padding to bottom of Unified Extensions Menu to look better */
+    #unified-extensions-area {
+        padding-bottom: 5px !important;
+    }
+
+    /* Allow extensions to use full display */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+}
+
+/* Apply this customization only on smaller screens in portrait mode */
+@media (max-width: 700px) {
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 64px !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 120px !important;
+    }
+
+}

src/userChrome/true_mobile_landscape.css

@@ -0,0 +1,230 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens in landscape mode */
+@media (max-height: 300px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 3.5px;
+        --urlbar-width: calc(100vw - 205.5px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 4.5px;
+        --urlbar-width: calc(100vw - 209.5px);
+    }
+
+    /* Remove items from Main App Menu (≡) */
+    #appMenu-fxa-status2,
+    #appMenu-fxa-separator,
+    #appMenu-protonMainView toolbarseparator,
+    #appMenu-fullscreen-button2,
+    #appMenu-passwords-button,
+    .subviewbutton[shortcut]::after {
+        display: none !important;
+    }
+
+    /* Remove extra space above zoom controls in Main App Menu (≡) */
+    #appMenu-zoom-controls {
+        margin-top: 0 !important;
+    }
+
+    /* Fix flickering of Main App Menu (≡) */
+    #appMenu-popup {
+        width: 260px !important;
+    }
+    #appMenu-protonMainView vbox.panel-subview-body {
+        height: 253px !important;
+        max-height: 253px !important;
+        width: 250px !important;
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Move Nav Bar to bottom */
+    :root:not([uidensity="touch"],[inFullscreen]) {
+        --uc-bottom-toolbar-height: calc(39px + var(--toolbarbutton-outer-padding) )
+    }
+    :root[uidensity="touch"]:not([inFullscreen]){
+        --uc-bottom-toolbar-height: calc(43px + var(--toolbarbutton-outer-padding) )
+    }
+    #browser,
+    #customization-container {
+        margin-bottom: var(--uc-bottom-toolbar-height,0px)
+    }
+    #nav-bar{
+        position: fixed !important;
+        bottom: 0px;
+        width: 100%;
+        z-index: 1;
+    }
+    #nav-bar[inFullscreen],
+    #TabsToolbar[inFullscreen],
+    .titlebar-buttonbox-container {
+        display: none;
+    }
+    .panel-viewstack {
+        max-height: unset !important;
+    }
+
+    /* Edit Bookmark Panel */
+    #editBookmarkPanel {
+        background-color: var(--arrowpanel-background) !important;
+        max-height: 100vh !important;
+        max-width: 100vw !important;
+        width: 100vw !important;
+    }
+    #editBookmarkPanel box.panel-header,
+    #editBookmarkHeaderSeparator,
+    #editBookmarkPanelInfoArea,
+    #editBookmarkSeparator,
+    #editBMPanel_folderRow,
+    #editBMPanel_tagsRow {
+        display: none !important;
+    }
+    #editBookmarkPanelContent {
+        padding-top: 0 !important;
+        padding-bottom: 0 !important;
+    }
+    #editBookmarkPanelBottomButtons {
+        margin-top: -5px !important;
+        margin-left: -50px !important;
+    }
+
+    /* Remove items from Tab Manager Menu */
+    #allTabsMenu-searchTabs,
+    #allTabsMenu-tabsSeparator {
+        display: none;
+    }
+
+    /* Fix flickering of Tab Manager Menu and extension popups */
+    #customizationui-widget-panel,
+    #customizationui-widget-multiview box.panel-viewstack {
+        height: calc(100vh - 35px) !important;
+        max-height: calc(100vh - 35px) !important;
+        width: 100vw !important;
+        max-width: 100vw !important;
+    }
+
+    /* Move Tab Manager Menu button to right of URL Bar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+    /* Remove items from Unified Extensions Menu */
+    #unified-extensions-panel .panel-header,
+    #unified-extensions-panel toolbarseparator,
+    #unified-extensions-manage-extensions {
+        display: none !important;
+    }
+
+    /* Adjust button padding and font size for secondary text in Unified Extensions Menu */
+    #unified-extensions-panel .subviewbutton {
+        padding: 6px !important;
+    }
+    .unified-extensions-item-message {
+        font-size: 75% !important;
+    }
+
+    /* Fix flickering of Unified Extensions Menu */
+    #unified-extensions-panel {
+        --uei-icon-size: 20px;
+        width: 360px !important;
+    }
+    #unified-extensions-view {
+        margin-top: 6px !important;
+        height: 230px !important;
+        max-height: 230px !important;
+        width: 350px !important;
+    }
+
+    /* Add padding to bottom of Unified Extensions Menu to look better */
+    #unified-extensions-area {
+        padding-bottom: 5px !important;
+    }
+
+    /* Allow extensions to use full display */
+    .webextension-popup-browser {
+        height: 100% !important;
+        min-height: 100% !important;
+        width: 100vw !important;
+        min-width: 100vw !important;
+    }
+
+    /* Adjust "Saved to Library!" popup notification */
+    #confirmation-hint {
+        padding: 10px !important;
+        width: 100vw !important;
+    }
+
+}
+
+/* Apply this customization only on smaller screens in portrait mode */
+@media (max-width: 700px) {
+
+    /* Added extra space to bottom of Main App Menu (≡) to compensate for orientation problem that would leave some items hidden in portrait mode when Main App Menu (≡) is first opened in landscape mode */
+    #appMenu-quit-button2 {
+        margin-bottom: 64px !important;
+    }
+
+    /* Added extra space to bottom of Unified Extensions Menu to compensate for orientation problem that would leave some extensions hidden in portrait mode when Unified Extentions Menu is first opened in landscape mode */
+    #unified-extensions-area {
+        padding-bottom: 120px !important;
+    }
+
+}

src/userChrome/true_mobile_mode-alt.css

@@ -0,0 +1,79 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 4px;
+        --urlbar-width: calc(100vw - 166px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 5px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 5px;
+        --urlbar-width: calc(100vw - 171.5px);
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing Indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Move Tab Manager Menu button to right of urlbar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        top: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+}

src/userChrome/true_mobile_mode.css

@@ -0,0 +1,79 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/******************************************/
+/*               IMPORTANT:               */
+/*                                        */
+/* One of the things this code will do is */
+/* to move the Tab Manager Menu button to */
+/* the right side of the URL Bar.         */
+/*                                        */
+/* For the best results, consider moving  */
+/* the Unified Extensions Menu button to  */
+/* the left of the URL Bar and removing   */
+/* less important toolbar items by using  */
+/* the "Customize Toolbar" feature, or by */
+/* using a user.js file in your profile.  */
+/******************************************/
+
+/* Apply this customization only on smaller screens */
+@media (max-width: 700px) {
+
+    /* Density variables */
+    :root:not([uidensity="touch"]) {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 32px;
+        --alltabs-button-width: 32px;
+        --alltabs-button-position: 3.5px;
+        --urlbar-width: calc(100vw - 166px);
+    }
+    :root[uidensity="touch"] {
+        --PanelUI-menu-button-position: 4px;
+        --alltabs-button-height: 34px;
+        --alltabs-button-width: 34px;
+        --alltabs-button-position: 4.5px;
+        --urlbar-width: calc(100vw - 171.5px);
+    }
+
+    /* Move Main App Menu (≡) button to allow room for Tab Manager Menu button */
+    #PanelUI-menu-button {
+        position: absolute !important;
+        right: 0px !important;
+        bottom: var(--PanelUI-menu-button-position) !important;
+    }
+
+    /* Hide Tab Bar and Private Browsing Indicator */
+    #tabbrowser-tabs,
+    #private-browsing-indicator-with-label {
+        visibility: collapse !important;
+    }
+
+    /* Move Tab Manager Menu button to right of urlbar */
+    :root {
+        --tab-border-radius: var(--toolbarbutton-border-radius) !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack {
+        height: var(--alltabs-button-height) !important;
+        width: var(--alltabs-button-width) !important;
+    }
+    #alltabs-button {
+        position: absolute;
+        bottom: var(--alltabs-button-position) !important;
+        right: 41.5px;
+        z-index: 2 !important;
+    }
+    #alltabs-button > .toolbarbutton-badge-stack::before {
+        bottom: calc(var(--toolbarbutton-inner-padding) * 0.7 ) !important;
+    }
+
+    /* Allow room for Tab Manager Menu button */
+    #nav-bar {
+        padding-right: 67px !important;
+    }
+
+    /* Reduce URL Bar width */
+    #urlbar-container {
+        max-width: var(--urlbar-width) !important;
+    }
+
+}

src/userChrome/urlbar.css

@@ -4,6 +4,7 @@
 /* Reduce minimum window width */
 #urlbar-container {
     min-width: 150px !important;
+    flex-shrink: 1 !important;
 }
 
 @media (max-width: 700px) {
@@ -19,7 +20,7 @@
     /* #back-button */
     #forward-button,
     /* #reload-button */
-    #home-button,
+    /*#home-button,*/
     #customizableui-special-spring1,
     /* (urlbar) */
     #customizableui-special-spring2,
@@ -82,6 +83,14 @@
     #PersonalToolbar {
         display: none;
     }
+
+    /* If the bookmarks toolbar is configured to only show on the new tab page,
+     * Firefox makes the toolbar overlap the browser. When it's then hidden by
+     * the rule above, the urlbar is pushed off the bottom of the window. To
+     * prevent this, set the height of the overlapped toolbar to 0. */
+    :root {
+        --bookmarks-toolbar-overlapping-browser-height: 0 !important;
+    }
 }
 
 /* Even though amazon is removed as search engine in policies.json, it gets

src/userChrome/userChrome-desktop.css

@@ -0,0 +1,66 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source files available here:
+   https://gitlab.com/postmarketOS/mobile-config-firefox/-/archive/master/mobile-config-firefox-master.zip
+   https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/
+   https://forums.puri.sm/t/mobile-friendly-firefox-customizations-for-librem-5/20313
+*/
+
+/*
+@import "fenix_colors.css";
+*/
+@import "true_mobile_landscape-alt.css";
+/*
+@import "true_mobile_landscape.css";
+*/
+@import "appMenu.css";
+/*
+@import "browser.css";
+*/
+@import "editBookmarkPanel.css";
+
+@import "findbar.css";
+
+@import "popups.css";
+
+@import "root.css";
+
+@import "tabmenu.css";
+
+@import "urlbar.css";
+
+@import "extensions_menu.css";
+/*
+@import "alt-browser-alt.css";
+*/
+@import "custom_rules.css";
+
+@import "hide_tabs_scrollbuttons.css";
+
+@import "tab_close_button_always_on_hover.css";
+
+@import "iconized_main_menu.css";
+
+@import "round_ui_items.css";
+/*
+@import "tab_counter.css";
+*/
+@import "hide_tab_counter.css";
+/*
+@import "hide_newtab_+_new-tab_buttons.css";
+*/
+@import "new-tab-button.css";
+
+@import "tabs_larger_min-width.css";
+
+@import "tabs_fill_available_width.css";
+/*
+@import "glow.css";
+
+@import "colorful_inactive_tabs.css";
+
+@import "tab_animated_active_border.css";
+
+@import "borderless_transparent_active_tab.css";
+*/

src/userChrome/userChrome-fenix.css

@@ -0,0 +1,58 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source files available here:
+   https://gitlab.com/postmarketOS/mobile-config-firefox/-/archive/master/mobile-config-firefox-master.zip
+   https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/
+   https://forums.puri.sm/t/mobile-friendly-firefox-customizations-for-librem-5/20313
+*/
+
+
+@import "fenix_colors.css";
+/*
+@import "true_mobile_landscape-alt.css";
+*/
+@import "true_mobile_landscape.css";
+
+@import "appMenu.css";
+/*
+@import "browser.css";
+*/
+@import "editBookmarkPanel.css";
+
+@import "findbar.css";
+
+@import "popups.css";
+
+@import "root.css";
+
+@import "tabmenu.css";
+
+@import "urlbar.css";
+
+@import "extensions_menu.css";
+
+@import "alt-browser-alt.css";
+
+@import "custom_rules.css";
+/*
+@import "round_ui_items.css";
+*/
+@import "numbered_tabs.css";
+
+@import "tab_counter.css";
+/*
+@import "fenix-alt.css";
+*/
+@import "fenix.css";
+/*
+@import "dynamic_popups.css";
+
+@import "dynamic_popups_plus.css";
+
+@import "dynamic_popups_max.css";
+*/
+@import "dynamic_popups_pro.css";
+/*
+@import "dynamic_popups_pro_max.css";
+*/

src/userChrome/userChrome-fenix_fox.css

@@ -0,0 +1,26 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source files available here:
+   https://gitlab.com/postmarketOS/mobile-config-firefox/-/archive/master/mobile-config-firefox-master.zip
+   https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/
+   https://forums.puri.sm/t/mobile-friendly-firefox-customizations-for-librem-5/20313
+*/
+
+/*
+@import "fenix_colors.css";
+
+@import "fenix_fox-alt.css";
+*/
+@import "fenix_fox.css";
+/*
+@import "dynamic_popups.css";
+
+@import "dynamic_popups_plus.css";
+
+@import "dynamic_popups_max.css";
+*/
+@import "dynamic_popups_pro.css";
+/*
+@import "dynamic_popups_pro_max.css";
+*/

src/userChrome/userChrome-fenix_one.css

@@ -0,0 +1,24 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source files available here:
+   https://gitlab.com/postmarketOS/mobile-config-firefox/-/archive/master/mobile-config-firefox-master.zip
+   https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/
+   https://forums.puri.sm/t/mobile-friendly-firefox-customizations-for-librem-5/20313
+*/
+
+/*
+@import "fenix_one-alt.css";
+*/
+@import "fenix_one.css";
+/*
+@import "dynamic_popups.css";
+
+@import "dynamic_popups_plus.css";
+
+@import "dynamic_popups_max.css";
+*/
+@import "dynamic_popups_pro.css";
+/*
+@import "dynamic_popups_pro_max.css";
+*/

src/userChrome/userChrome-mobile.css

@@ -0,0 +1,64 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source files available here:
+   https://gitlab.com/postmarketOS/mobile-config-firefox/-/archive/master/mobile-config-firefox-master.zip
+   https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/
+   https://forums.puri.sm/t/mobile-friendly-firefox-customizations-for-librem-5/20313
+*/
+
+/*
+@import "fenix_colors.css";
+
+@import "true_mobile_landscape-alt.css";
+*/
+@import "true_mobile_landscape.css";
+
+@import "appMenu.css";
+
+@import "browser.css";
+
+@import "editBookmarkPanel.css";
+
+@import "findbar.css";
+
+@import "popups.css";
+
+@import "root.css";
+
+@import "tabmenu.css";
+
+@import "urlbar.css";
+
+@import "extensions_menu.css";
+/*
+@import "alt-browser-alt.css";
+*/
+@import "custom_rules.css";
+
+@import "hide_tabs_scrollbuttons.css";
+
+@import "tab_close_button_always_on_hover.css";
+
+@import "iconized_main_menu.css";
+
+@import "round_ui_items.css";
+/*
+@import "single_tab_mode-alt.css";
+
+@import "alt-single_tab_mode-alt.css";
+*/
+@import "single_tab_mode.css";
+
+@import "numbered_tabs.css";
+
+@import "tab_counter.css";
+/*
+@import "glow.css";
+
+@import "colorful_inactive_tabs.css";
+
+@import "tab_animated_active_border.css";
+
+@import "borderless_transparent_active_tab.css";
+*/

src/userChrome/userChrome-true-mobile.css

@@ -0,0 +1,60 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+/* Source files available here:
+   https://gitlab.com/postmarketOS/mobile-config-firefox/-/archive/master/mobile-config-firefox-master.zip
+   https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/
+   https://forums.puri.sm/t/mobile-friendly-firefox-customizations-for-librem-5/20313
+*/
+
+/*
+@import "fenix_colors.css";
+
+@import "true_mobile_landscape-alt.css";
+*/
+@import "true_mobile_landscape.css";
+
+@import "appMenu.css";
+/*
+@import "browser.css";
+*/
+@import "editBookmarkPanel.css";
+
+@import "findbar.css";
+
+@import "popups.css";
+
+@import "root.css";
+
+@import "tabmenu.css";
+
+@import "urlbar.css";
+
+@import "extensions_menu.css";
+
+@import "alt-browser-alt.css";
+
+@import "custom_rules.css";
+
+@import "iconized_main_menu.css";
+
+@import "round_ui_items.css";
+
+@import "numbered_tabs.css";
+
+@import "tab_counter.css";
+/*
+@import "true_mobile_mode-alt.css";
+*/
+@import "true_mobile_mode.css";
+/*
+@import "dynamic_popups.css";
+
+@import "dynamic_popups_plus.css";
+
+@import "dynamic_popups_max.css";
+*/
+@import "dynamic_popups_pro.css";
+/*
+@import "dynamic_popups_pro_max.css";
+*/

src/userContent/addons.css

@@ -1,8 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:addons"), url-prefix("about:addons") {
-    :root {
-        --section-width: min(664px, 100%) !important;
-    }
-}

src/userContent/config.css

@@ -1,37 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:config") {
-    #search-container,
-    #toolbar, #prefs {
-        min-width: 300px !important;
-    }
-
-    @media (max-width: 644px) {
-        #toolbar {
-            flex-direction: column;
-        }
-
-        #about-config-search {
-            max-width: 100%;
-        }
-
-        #prefs {
-            word-wrap: anywhere;
-        }
-
-        .checkbox-container {
-            margin-top: 5px;
-        }
-    }
-
-    @media (max-width: 500px) {
-        tr {
-            font-size: 12px;
-        }
-
-        th {
-            padding-left: 8px !important;
-        }
-    }
-}

src/userContent/home.css

@@ -1,18 +0,0 @@
-/* Copyright 2022 Oliver Smith
- * SPDX-License-Identifier: MPL-2.0 */
-
-@namespace url("http://www.w3.org/1999/xhtml");
-
-@-moz-document url("about:home"), url("about:blank"), url("about:newtab") {
-    @media (max-width: 700px) {
-
-        .outer-wrapper.only-search {
-            padding-top: 50px !important;
-        }
-
-        .customize-menu {
-            width: 100% !important;
-        }
-
-    }
-}

src/userContent/license.css

@@ -1,11 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:license") {
-    @media (max-width: 500px) {
-        .license-header {
-            background-image: none !important;
-            padding-inline-end: unset !important;
-        }
-    }
-}

src/userContent/logins.css

@@ -1,24 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:logins") {
-    .container {
-        min-width: 300px !important;
-    }
-
-    @media (max-width: 700px) {
-        body {
-            --sidebar-width: 200px !important;
-            grid-template-columns: var(--sidebar-width) 1fr !important;
-        }
-
-        .edit-button, .delete-button {
-            font-size: 0 !important;
-            background-position: center;
-        }
-
-        #branding-logo {
-            display: none;
-        }
-    }
-}

src/userContent/policies.css

@@ -1,11 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:policies"), url-prefix("about:policies") {
-    @media (max-width: 830px) {
-        tbody.collapsible td,
-        .active-policies td {
-            word-wrap: anywhere;
-        }
-    }
-}

src/userContent/preferences.css

@@ -1,23 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document regexp("about:preferences.*") {
-    .sticky-container {
-        display: flex;
-    }
-
-    #policies-container {
-        display: none;
-    }
-
-    /* #sync page */
-    .fxaMobilePromo {
-        display: none;
-    }
-
-    @media (max-width: 700px) {
-        .fxaSyncIllustration {
-            display: none;
-        }
-    }
-}

src/userContent/protections.css

@@ -1,49 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:protections") {
-    #report-content {
-        width: calc(100% - 16px) !important;
-        max-width: 800px !important;
-    }
-
-    /* hide element with Firefox for Android and iOS ad */
-    .lockwise-card .card-body,
-    #mobile-hanger {
-        display: none !important;
-    }
-
-    @media (max-width: 800px) {
-        #report-content {
-            margin: 16px 8px !important;
-        }
-
-        .icon {
-            width: 32px !important;
-            height: 32px !important;
-        }
-
-        .body-wrapper {
-            /* make trackers report to fill the entire card width */
-            grid-column-start: 1 !important;
-            grid-column-end: -1 !important;
-        }
-
-        #manage-protections,
-        #sign-up-for-monitor-link,
-        #save-passwords-button,
-        #get-proxy-extension-link {
-            /* move button on a separate row */
-            grid-area: 2 / 1 / 2 / 6 !important;
-        }
-
-        .card-header .wrapper {
-            grid-row-gap: 8px !important;
-        }
-
-        .card:not(.has-logins) .wrapper div:nth-child(1) {
-            /* make card title to use more width */
-            grid-column-end: -1 !important;
-        }
-    }
-}

src/userContent/reader.css

@@ -1,55 +0,0 @@
-/* Copyright 2022 Tim Magee
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url-prefix("about:reader") {
-    @media (max-width: 800px) {
-        .toolbar-container {
-            margin-inline-start: 0px !important;
-            position: fixed !important;
-            top: 0px !important;
-            height: 74px !important;
-            width: 100% !important;
-            left: 0px !important;
-            background-color: rgba(255,255,255,1);
-        }
-
-        .dark .toolbar-container {
-            background-color: rgba(3,3,3,1);
-        }
-
-        .sepia .toolbar-container {
-            background-color: rgba(244,236,216,1);
-        }
-
-        .toolbar {
-            margin-inline-start: unset !important;
-            width: unset !important;
-        }
-
-        .dropdown li {
-            display: inline !important;
-        }
-
-        .dropdown {
-            display: inline;
-        }
-
-        body {
-            padding: 74px 0px !important;
-            margin: 15px 15px 0px !important;
-            --content-width: unset !important;
-        }
-
-        .header > h1 {
-            margin: 10px 0 !important;
-        }
-
-        .header > .meta-data {
-            margin: 0 0 5px !important;
-        }
-
-        .header > .credits {
-            margin: 0 0 5px !important;
-        }
-    }
-}

src/userContent/rights.css

@@ -1,11 +0,0 @@
-/* Copyright 2022 Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document url("about:rights") {
-    @media (max-width: 500px) {
-        .rights-header {
-            background-image: none !important;
-            padding-inline-end: unset !important;
-        }
-    }
-}

src/userContent/sidebar.css

@@ -1,42 +0,0 @@
-/* Copyright 2022 plata, Anri Dellal
- * SPDX-License-Identifier: MPL-2.0 */
-
-@-moz-document regexp("about:(preferences|addons|policies).*") {
-    .category-icon {
-        user-select: none !important;
-    }
-
-    @media (max-width: 700px) {
-        /* avoid that sidebar is too wide */
-        :root {
-            --in-content-sidebar-width: 50px !important;
-            --sidebar-width: 50px !important;
-        }
-
-        /* reduce space around category icons */
-        #categories > .category {
-            margin-inline-start: auto !important;
-            padding-inline: auto !important;
-        }
-
-        .category-name {
-            display: none !important;
-        }
-
-        /* reduce space around footer icons (addons, help) */
-        .sidebar-footer-list {
-            margin-inline: auto !important;
-            padding-inline: auto !important;
-        }
-
-        .sidebar-footer-label {
-            display: none !important;
-        }
-    }
-
-    @media (max-height: 400px) {
-        #categories {
-            margin-top: 8px !important;
-        }
-    }
-}

src/userContent/theme-fenix.css

@@ -0,0 +1,518 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+@-moz-document
+regexp("^(about:).*") {
+
+    /* Fenix Colors */
+    :root {
+        --addon-card-background: rgba(171,113,255,0.1) !important;
+        --brand-color-accent: rgb(80,54,132) !important;
+        --brand-color-accent-active: rgb(80,54,132) !important;
+        --brand-color-accent-hover: rgb(80,54,132) !important;
+        --color-canvas: rgb(167,111,250) !important;
+        --card-outline-color: rgb(171,113,255) !important;
+        --card-shadow: var(--shadow-10) !important;
+        --card-shadow-hover: var(--card-shadow), 0 0 0 5px var(--card-outline-color) !important;
+        --checkbox-border-color: white !important;
+        --checkbox-checked-active-bgcolor: var(--in-content-box-background-active) !important;
+        --checkbox-checked-bgcolor: var(--in-content-box-border-color) !important;
+        --checkbox-checked-border-color: var(--in-content-box-border-color) !important;
+        --checkbox-checked-color: var(--in-content-box-text-color) !important;
+        --checkbox-checked-hover-bgcolor: var(--in-content-box-background-hover) !important;
+        --checkbox-unchecked-active-bgcolor: var(--in-content-box-background-active) !important;
+        --checkbox-unchecked-bgcolor: var(--in-content-box-background) !important;
+        --checkbox-unchecked-hover-bgcolor: var(--in-content-box-background-hover) !important;
+        --dialog-warning-text-color: white !important;
+        --in-content-accent-color: rgb(171,113,255) !important;
+        --in-content-accent-color-active: rgb(203,158,255) !important;
+        --in-content-border-color: rgb(171,113,255) !important;
+        --in-content-border-active: rgb(203,158,255) !important;
+        --in-content-border-active-shadow: rgb(203,158,255) !important;
+        --in-content-border-hover: rgb(203,158,255) !important;
+        --in-content-border-invalid: rgb(171,113,255) !important;
+        --in-content-box-background: rgb(41,29,79) !important;
+        --in-content-box-background-active: rgb(203,158,255) !important;
+        --in-content-box-background-hover: rgb(203,158,255) !important;
+        --in-content-box-background-odd: var(--in-content-box-info-background) !important;
+        --in-content-box-border-color: rgb(171,113,255) !important;
+        --in-content-box-text-color: white !important;
+        --in-content-box-info-background: rgba(171,113,255,0.2) !important;
+        --in-content-button-background: rgb(171,113,255) !important;
+        --in-content-button-background-active: rgb(203,158,255) !important;
+        --in-content-button-background-hover: rgb(203,158,255) !important;
+        --in-content-button-border-color: rgb(171,113,255) !important;
+        --in-content-button-border-color-active: rgb(203,158,255) !important;
+        --in-content-button-border-color-hover: rgb(203,158,255) !important;
+        --in-content-button-text-color: white !important;
+        --in-content-button-text-color-active: white !important;
+        --in-content-button-text-color-hover: white !important;
+        --in-content-category-background: rgb(41,29,79) !important;
+        --in-content-category-background-hover: rgb(171,113,255) !important;
+        --in-content-category-background-selected: rgb(171,113,255) !important;
+        --in-content-category-background-selected-hover: rgb(171,113,255) !important;
+        --in-content-category-text: white !important;
+        --in-content-category-text-selected: white !important;
+        --in-content-danger-button-background: darkred !important;
+        --in-content-danger-button-background-active: red !important;
+        --in-content-danger-button-background-hover: red !important;
+        --in-content-deemphasized-text: lightgray !important;
+        --in-content-error-text-color: white !important;
+        --in-content-focus-outline-color: rgb(171,113,255) !important;
+        --in-content-icon-color: white !important;
+        --in-content-item-hover: rgb(203,158,255) !important;
+        --in-content-item-hover-text: white !important;
+        --in-content-item-selected: rgb(203,158,255) !important;
+        --in-content-item-selected-text: white !important;
+        --in-content-link-color: rgb(171,113,255) !important;
+        --in-content-link-color-active: rgb(203,158,255) !important;
+        --in-content-link-color-hover: rgb(203,158,255) !important;
+        --in-content-link-color-visited: rgb(171,113,255) !important;
+        --in-content-page-background: rgb(41,29,79) !important;
+        --in-content-page-color: rgb(171,113,255) !important;
+        --in-content-primary-button-background: rgb(171,113,255) !important;
+        --in-content-primary-button-background-active: rgb(203,158,255) !important;
+        --in-content-primary-button-background-hover: rgb(203,158,255) !important;
+        --in-content-primary-button-border-color: rgb(171,113,255) !important;
+        --in-content-primary-button-border-hover: rgb(203,158,255) !important;
+        --in-content-primary-button-text-color: white !important;
+        --in-content-primary-button-text-color-hover: white !important;
+        --in-content-selected-text: white !important;
+        --in-content-table-background: rgb(41,29,79) !important;
+        --in-content-table-border-color: rgb(171,113,255) !important;
+        --in-content-table-border-dark-color: rgb(144,89,255) !important;
+        --in-content-table-header-background: rgb(41,29,79) !important;
+        --in-content-table-header-color: white !important;
+        --in-content-text-color: white !important;
+        --in-content-warning-container: darkorange !important;
+        --shadow-10: 0 1px 4px black !important;
+        --shadow-30: 0 4px 16px black !important;
+        color: white !important;
+    }
+    ::selection {
+        background: rgb(171,113,255) !important;
+        color: white !important;
+    }
+
+    /* About:Addons */
+    #categories > .category[selected], #categories > .category.selected {
+        background-color: var(--in-content-button-background) !important;
+        color: var(--in-content-button-text-color) !important;
+    }
+    .addon.card {
+        background-color: var(--addon-card-background) !important;
+    }
+    .radio-container-with-text > input {
+        border: 2px solid !important;
+        background-color: var(--in-content-page-background) !important;
+        color: var(--in-content-page-color) !important;
+    }
+    .radio-container-with-text > input:hover {
+        background-color: var(--in-content-button-background-hover) !important;
+    }
+    .radio-container-with-text > input:active {
+        background-color: var(--in-content-button-background-active) !important;
+    }
+
+    /* About:Preferences */
+    .radio-check {
+        border: 2px solid !important;
+        border-color: white !important;
+        background-color: var(--in-content-page-background) !important;
+    }
+    .radio-check[selected] {
+        border-color: var(--in-content-page-color) !important;
+        color: var(--in-content-page-color) !important;
+    }
+    .web-appearance-choice-image-container {
+        background-color: var(--in-content-page-background) !important;
+    }
+    .web-appearance-choice-image-container:hover {
+        background-color: var(--in-content-button-background-hover) !important;
+    }
+    .web-appearance-choice-image-container:active {
+        background-color: var(--in-content-button-background-active) !important;
+    }
+    .web-appearance-choice input {
+        background-color: var(--in-content-page-background) !important;
+        border: 2px solid !important;
+        border-color: var(--in-content-page-color) !important;
+        color: var(--in-content-page-color) !important;
+    }
+    .web-appearance-choice input:hover {
+        background-color: var(--in-content-button-background-hover) !important;
+    }
+    .web-appearance-choice input:active {
+        background-color: var(--in-content-button-background-active) !important;
+    }
+    label.web-appearance-choice:nth-child(1) > div:nth-child(2) > span:nth-child(2) {
+        display: none !important;
+    }
+    label.web-appearance-choice:nth-child(1) > div:nth-child(2)::after {
+        content: "Auto" !important;
+    }
+
+}
+
+@-moz-document
+regexp("^(?!about:).*") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Table font size (prevents horizontal scroll on web pages) */
+        tr {
+            font-size: 13px;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:addons"),
+url-prefix("about:addons") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Page width */
+        :root {
+            --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
+        }
+        body {
+            min-width: 100vw !important;
+            max-width:100vw !important;
+            width: 100vw !important;
+        }
+
+        /* About:Addons */
+        .search-label,
+        .textbox-search-icons {
+            display: none !important;
+        }
+        input::placeholder {
+            color: white !important;
+            opacity: 100% !important;
+        }
+        search-addons > search-textbox {
+            background-color: var(--in-content-button-background) !important;
+            color: var(--in-content-button-text-color) !important;
+            position: fixed !important;
+            top: 0 !important;
+            left: 0 !important;
+            padding: 0 !important;
+            width: 49px !important;
+        }
+        search-addons > search-textbox:hover {
+            background-color: var(--in-content-button-background-hover) !important;
+        }
+        search-addons > search-textbox:active {
+            background-color: var(--in-content-button-background-active) !important;
+        }
+        search-addons > search-textbox[focused] {
+            background-color: var(--in-content-page-background) !important;
+            border: 2px solid var(--card-outline-color) !important;
+            width: 100vw !important;
+            z-index: 2 !important;
+        }
+        .main-search {
+            padding-top: 18px !important;
+            padding-bottom: 18px !important;
+        }
+        .main-heading {
+            position: fixed !important;
+            top: 0 !important;
+            padding: 0 !important;
+        }
+        .page-options-menu {
+            position: fixed !important;
+            top: 0 !important;
+            right: 0 !important;
+        }
+        #categories > .category {
+            margin-left: 0px !important;
+        }
+        .sidebar-footer-list {
+            margin-inline-start: 0 !important;
+        }
+        .list-section-heading {
+            margin-top: 0 !important;
+        }
+        .addon-description {
+            padding-right: 40px !important;
+        }
+        .addon-badge-recommended {
+            margin-right: 10px !important;
+        }
+        .more-options-button {
+            margin-inline-start: -6px !important;
+            min-width: 36px !important;
+        }
+        .toggle-button {
+            margin-right: -60px !important;
+            margin-bottom: -60px !important;
+            height: 12px !important;
+            width: 24px !important;
+        }
+        .toggle-button:before {
+            margin-top: -4px !important;
+            margin-left: -6px !important;
+            height: 18px !important;
+            width: 18px !important;
+        }
+
+    }
+
+    /* Apply this customization only on smaller screens in portrait mode */
+    @media (max-width: 700px) {
+
+        /* Reduce addon cards width and font to fit display without horizontal scrolling */
+        .card {
+            max-width: 250px !important;
+            font-size: 8pt !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:config") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:Config */
+        #search-container,
+        #toolbar,
+        #prefs {
+            min-width: calc(100vw - 20px) !important;
+        }
+        #toolbar {
+            flex-direction: column;
+        }
+        #prefs {
+            word-wrap: anywhere;
+        }
+        .checkbox-container {
+            margin-top: 6px;
+            padding-bottom: 3px;
+        }
+        tr {
+            font-size: 12px;
+        }
+        th {
+            padding-left: 8px !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:license") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:License */
+        .license-header {
+            background-image: none !important;
+            padding-inline-end: unset !important;
+        }
+        #lic-info > pre {
+            font-size: 4pt !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:policies"),
+url-prefix("about:policies") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Page width */
+        :root {
+            --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
+        }
+
+        /* About:Policies */
+        #categories > .category {
+            margin-left: 0px !important;
+        }
+        td {
+            font-size: 9px;
+            padding-left: 5px !important;
+            padding-right: 5px !important;
+            word-wrap: anywhere;
+        }
+
+    }
+
+}
+
+@-moz-document
+regexp("about:preferences.*") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Page width */
+        :root {
+            --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
+        }
+
+        /* About:Preferences */
+        #searchInput {
+            display: none !important;
+        }
+        .pane-container {
+            margin-inline-start: 10px !important;
+            margin-inline-end: 10px !important;
+            width: calc(100vw - 70px) !important;
+            min-width: calc(100vw - 70px) !important;
+        }
+        #category-general,
+        #category-home,
+        #category-search,
+        #category-privacy,
+        #category-more-from-mozilla {
+            width: 48px !important;
+        }
+        #categories > .category {
+            margin-left: 0px !important;
+        }
+        .sidebar-footer-list {
+            margin-inline-start: 0 !important;
+        }
+        .accessory-button {
+            min-width: 100px !important;
+        }
+        #defaultFont,
+        #advancedFonts {
+            max-width: 100px !important;
+            width: 100px !important;
+        }
+        #defaultFontSizeLabel {
+            margin-left: -196px !important;
+        }
+        #defaultFontSizeLabel,
+        #defaultFontSize {
+            margin-bottom: -80px !important;
+        }
+        #primaryBrowserLocale {
+            min-width: 20px !important;
+        }
+
+        /* About:Preferences#Privacy */
+        #contentBlockingHeader {
+            padding-left: 28px !important;
+        }
+        #trackingProtectionShield {
+            margin-inline-end: 0 !important;
+            margin-top: -34px !important;
+            max-height: 20px !important;
+            max-width: 20px !important;
+            height: 20px !important;
+            width: 20px !important;
+        }
+        #contentBlockingDescription {
+            font-size: 9pt !important;
+        }
+        #trackingProtectionExceptions {
+            padding-left: 0 !important;
+            padding-right: 0 !important;
+            max-width: 30px !important;
+            width: 30px !important;
+        }
+        #historyMode {
+            max-width: 235.5px !important;
+            width: 235.5px !important;
+        }
+
+        /* About:Preferences#MoreFromMozilla */
+        .simple .qr-code-box-title {
+          max-width: 235px !important;
+          width: 235px !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:protections") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:Protections */
+        #report-content {
+            margin: 0 !important;
+            padding: 50px !important;
+            max-width: 100vw !important;
+            width: 100vw !important;
+        }
+        #mobile-hanger {
+            display: none !important;
+        }
+        .body-wrapper {
+            grid-column-start: 1 !important;
+            grid-column-end: -1 !important;
+        }
+        #manage-protections,
+        #sign-up-for-monitor-link,
+        #save-passwords-button,
+        #get-proxy-extension-link {
+            grid-area: 2 / 1 / 2 / 6 !important;
+        }
+        .card-header .wrapper {
+            grid-row-gap: 8px !important;
+        }
+        .card:not(.has-logins) .wrapper div:nth-child(1) {
+            grid-column-end: -1 !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:rights") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:Rights */
+        .rights-header {
+            background-image: none !important;
+            padding-inline-end: unset !important;
+        }
+
+    }
+
+}

src/userContent/theme-non-colorized.css

@@ -0,0 +1,371 @@
+/* Copyright 2023 user0
+ * SPDX-License-Identifier: MPL-2.0 */
+
+@-moz-document
+regexp("^(?!about:).*") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Table font size (prevents horizontal scroll on web pages) */
+        tr {
+            font-size: 13px;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:addons"),
+url-prefix("about:addons") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Page width */
+        :root {
+            --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
+        }
+        body {
+            min-width: 100vw !important;
+            max-width:100vw !important;
+            width: 100vw !important;
+        }
+
+        /* About:Addons */
+        .search-label,
+        .textbox-search-icons {
+            display: none !important;
+        }
+        input::placeholder {
+            color: white !important;
+            opacity: 100% !important;
+        }
+        search-addons > search-textbox {
+            background-color: var(--in-content-button-background) !important;
+            color: var(--in-content-button-text-color) !important;
+            position: fixed !important;
+            top: 0 !important;
+            left: 0 !important;
+            padding: 0 !important;
+            width: 49px !important;
+        }
+        search-addons > search-textbox:hover {
+            background-color: var(--in-content-button-background-hover) !important;
+        }
+        search-addons > search-textbox:active {
+            background-color: var(--in-content-button-background-active) !important;
+        }
+        search-addons > search-textbox[focused] {
+            background-color: var(--in-content-page-background) !important;
+            border: 2px solid var(--card-outline-color) !important;
+            width: 100vw !important;
+            z-index: 2 !important;
+        }
+        .main-search {
+            padding-top: 18px !important;
+            padding-bottom: 18px !important;
+        }
+        .main-heading {
+            position: fixed !important;
+            top: 0 !important;
+            padding: 0 !important;
+        }
+        .page-options-menu {
+            position: fixed !important;
+            top: 0 !important;
+            right: 0 !important;
+        }
+        #categories > .category {
+            margin-left: 0px !important;
+        }
+        .sidebar-footer-list {
+            margin-inline-start: 0 !important;
+        }
+        .list-section-heading {
+            margin-top: 0 !important;
+        }
+        .addon-description {
+            padding-right: 40px !important;
+        }
+        .addon-badge-recommended {
+            margin-right: 10px !important;
+        }
+        .more-options-button {
+            margin-inline-start: -6px !important;
+            min-width: 36px !important;
+        }
+        .toggle-button {
+            margin-right: -60px !important;
+            margin-bottom: -60px !important;
+            height: 12px !important;
+            width: 24px !important;
+        }
+        .toggle-button:before {
+            margin-top: -4px !important;
+            margin-left: -6px !important;
+            height: 18px !important;
+            width: 18px !important;
+        }
+
+    }
+
+    /* Apply this customization only on smaller screens in portrait mode */
+    @media (max-width: 700px) {
+
+        /* Reduce addon cards width and font to fit display without horizontal scrolling */
+        .card {
+            max-width: 250px !important;
+            font-size: 8pt !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:config") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:Config */
+        #search-container,
+        #toolbar,
+        #prefs {
+            min-width: calc(100vw - 20px) !important;
+        }
+        #toolbar {
+            flex-direction: column;
+        }
+        #prefs {
+            word-wrap: anywhere;
+        }
+        .checkbox-container {
+            margin-top: 6px;
+            padding-bottom: 3px;
+        }
+        tr {
+            font-size: 12px;
+        }
+        th {
+            padding-left: 8px !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:license") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:License */
+        .license-header {
+            background-image: none !important;
+            padding-inline-end: unset !important;
+        }
+        #lic-info > pre {
+            font-size: 4pt !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:policies"),
+url-prefix("about:policies") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Page width */
+        :root {
+            --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
+        }
+
+        /* About:Policies */
+        #categories > .category {
+            margin-left: 0px !important;
+        }
+        td {
+            font-size: 9px;
+            padding-left: 5px !important;
+            padding-right: 5px !important;
+            word-wrap: anywhere;
+        }
+
+    }
+
+}
+
+@-moz-document
+regexp("about:preferences.*") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* Page width */
+        :root {
+            --in-content-sidebar-width: 50px !important;
+            --sidebar-width: 50px !important;
+        }
+
+        /* About:Preferences */
+        #searchInput {
+            display: none !important;
+        }
+        .pane-container {
+            margin-inline-start: 10px !important;
+            margin-inline-end: 10px !important;
+            width: calc(100vw - 70px) !important;
+            min-width: calc(100vw - 70px) !important;
+        }
+        #category-general,
+        #category-home,
+        #category-search,
+        #category-privacy,
+        #category-more-from-mozilla {
+            width: 48px !important;
+        }
+        #categories > .category {
+            margin-left: 0px !important;
+        }
+        .sidebar-footer-list {
+            margin-inline-start: 0 !important;
+        }
+        label.web-appearance-choice:nth-child(1) > div:nth-child(2) > span:nth-child(2) {
+            display: none !important;
+        }
+        label.web-appearance-choice:nth-child(1) > div:nth-child(2)::after {
+            content: "Auto" !important;
+        }
+        .accessory-button {
+            min-width: 100px !important;
+        }
+        #defaultFont,
+        #advancedFonts {
+            max-width: 100px !important;
+            width: 100px !important;
+        }
+        #defaultFontSizeLabel {
+            margin-left: -196px !important;
+        }
+        #defaultFontSizeLabel,
+        #defaultFontSize {
+            margin-bottom: -80px !important;
+        }
+        #primaryBrowserLocale {
+            min-width: 20px !important;
+        }
+
+        /* About:Preferences#Privacy */
+        #contentBlockingHeader {
+            padding-left: 28px !important;
+        }
+        #trackingProtectionShield {
+            margin-inline-end: 0 !important;
+            margin-top: -34px !important;
+            max-height: 20px !important;
+            max-width: 20px !important;
+            height: 20px !important;
+            width: 20px !important;
+        }
+        #contentBlockingDescription {
+            font-size: 9pt !important;
+        }
+        #trackingProtectionExceptions {
+            padding-left: 0 !important;
+            padding-right: 0 !important;
+            max-width: 30px !important;
+            width: 30px !important;
+        }
+        #historyMode {
+            max-width: 235.5px !important;
+            width: 235.5px !important;
+        }
+
+        /* About:Preferences#MoreFromMozilla */
+        .simple .qr-code-box-title {
+          max-width: 235px !important;
+          width: 235px !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:protections") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:Protections */
+        #report-content {
+            margin: 0 !important;
+            padding: 50px !important;
+            max-width: 100vw !important;
+            width: 100vw !important;
+        }
+        #mobile-hanger {
+            display: none !important;
+        }
+        .body-wrapper {
+            grid-column-start: 1 !important;
+            grid-column-end: -1 !important;
+        }
+        #manage-protections,
+        #sign-up-for-monitor-link,
+        #save-passwords-button,
+        #get-proxy-extension-link {
+            grid-area: 2 / 1 / 2 / 6 !important;
+        }
+        .card-header .wrapper {
+            grid-row-gap: 8px !important;
+        }
+        .card:not(.has-logins) .wrapper div:nth-child(1) {
+            grid-column-end: -1 !important;
+        }
+
+    }
+
+}
+
+@-moz-document
+url("about:rights") {
+
+    /* Apply this customization only on smaller screens */
+    @media
+    (max-height: 300px),
+    (max-width: 700px) {
+
+        /* About:Rights */
+        .rights-header {
+            background-image: none !important;
+            padding-inline-end: unset !important;
+        }
+
+    }
+
+}