Create classic_firefox_menu_button.css

chrome/classic_firefox_menu_button.css

@@ -0,0 +1,41 @@
+/* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/classic_firefox_menu_button.css made available under Mozilla Public License v. 2.0
+See the above repository for updates as well as full license text. */
+
+/* Makes the main menu button appear in the top left corner styled similarly to Firefox versions 4 to 29 */
+
+#PanelUI-button{
+   /* Nightly colors scheme */
+  /*--uc-fx-button-color: #9752fa;
+  --uc-fx-button-sec-color: #00b2fa8a;*/
+   
+  /* Release color scheme*/
+  --uc-fx-button-color: #ff8313;
+  --uc-fx-button-sec-color: #ffdfbf85;
+}
+
+#PanelUI-button{ -moz-box-ordinal-group: 0; margin-inline: 2px var(--uc-window-drag-space-width,24px) !important; }
+:root[tabsintitlebar] #nav-bar{ border-left-width: 0px; padding-left: 0px !important; }
+#PanelUI-menu-button{ -moz-box-align: start !important; }
+#PanelUI-menu-button > stack{
+  background-color: var(--uc-fx-button-color);
+  background-image: linear-gradient(var(--uc-fx-button-sec-color), transparent) !important;
+  padding-inline: 5px !important;
+  list-style-image: url(chrome://global/skin/icons/arrow-dropdown-12.svg) !important;
+  border-radius: 0 0 4px 4px !important;
+  border: 2px groove var(--uc-fx-button-color);
+  border-top: none;
+  display: -moz-box;
+  padding-block: 4px !important;
+}
+
+#PanelUI-menu-button:hover > stack,
+#PanelUI-menu-button[open] > stack{
+  background-color: var(--uc-fx-button-color) !important;
+  background-image: linear-gradient(rgba(100,100,150,0.3), transparent) !important;
+}
+
+#PanelUI-menu-button > stack::before{
+  display: -moz-box;
+  content: "Firefox"; /* Change text here */
+  font-weight: 700;
+}

html_resources/tagmap.json

@@ -99,5 +99,6 @@
 "vertical_context_navigation_v2.css":["navigation","menu","popup"],
 "vertical_menubar.css":["menubar","hack"],
 "window_control_placeholder_support.css":["window-control","patch"],
-"vertical_popup_menubar.css":["menubar","menu","toolbars","popup"]
+"vertical_popup_menubar.css":["menubar","menu","toolbars","popup"],
+"classic_firefox_menu_button.css":["classic","menu"]
 }

tags.csv

@@ -99,3 +99,4 @@ vertical_context_navigation_v2.css,navigation,menu,popup
 vertical_menubar.css,menubar,hack
 window_control_placeholder_support.css,window-control,patch
 vertical_popup_menubar.css,menubar,menu,toolbars,popup
+classic_firefox_menu_button.css,classic,menu