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
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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

@@ -1,6 +1,7 @@
 # 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 **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.
 
@@ -22,7 +23,6 @@ repository also does not replace a proper implementation in
 * 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
@@ -109,10 +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/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

src/userChrome/tabmenu.css

@@ -61,7 +61,8 @@
         /*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
+         * effect, but it doesn't seem to be necessary either. */
         /*-moz-box-flex: initial !important;
     }*/
 
@@ -72,13 +73,19 @@
         /*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;
+    }
 
-    #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 */
         width: 0;
         max-width: calc(100vw - 20px);

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) {
@@ -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