feat(firefox): add extras to gx theme

nixos/home/firefox/custom.css

@@ -0,0 +1,35 @@
+.browser-toolbar > * #alltabs-button,
+#appMenu-fxa-status2,
+#appMenu-fxa-separator {
+  display: none !important;
+}
+
+#unified-extensions-button {
+  display: flex;
+  left: calc(100vw - var(--uc-window-control-width) - 13px) !important;
+  top: var(--windowed-top-padding, -0.5px);
+  z-index: 3 !important;
+}
+
+#appMenu-popup {
+  position: fixed !important;
+  top: 0px !important;
+  left: 0px !important;
+  margin: 0 !important;
+}
+
+#appMenu-popup panelview {
+  border-width: 2px 6px !important;
+  border-radius: 5% 0 0 5% !important;
+  border-image: var(--panel-separator-zap-gradient4) 1 !important;
+}
+
+#unified-extensions-panel panelview {
+  border-width: 0 !important;
+  border-radius: 0px !important;
+}
+
+slot {
+  margin: 0 !important;
+  border-radius: 5% 0 0 5% !important;
+}

nixos/home/firefox/firefox-gx.nix

@@ -23,6 +23,8 @@ stdenvNoCC.mkDerivation {
     sed -i 's/rounded_corner.chrome",        true/rounded_corner.chrome",        false/' ./user.js
     sed -i 's/rounded_corner.wave",          false/rounded_corner.wave",          true/' ./user.js
 
+    mv ./Extras/Left-SideBar/ogx_left-sidebar.css ./chrome/components
+    mv ./Extras/OneLine/ogx_oneline.css ./chrome/components
 
     mkdir -p $out
     cp -r ./* $out

nixos/home/firefox/main.nix

@@ -6,7 +6,9 @@
 in
 {
   home.file = {
-    ".mozilla/firefox/matt/chrome".source = "${firefox-gx}/chrome";
+    ".mozilla/firefox/matt/chrome/components".source = "${firefox-gx}/chrome/components";
+    ".mozilla/firefox/matt/chrome/icons".source      = "${firefox-gx}/chrome/icons";
+    ".mozilla/firefox/matt/chrome/images".source     = "${firefox-gx}/chrome/images";
   };
 
   programs.firefox = {
@@ -15,14 +17,23 @@ in
       isDefault = true;
       id = 0;
 
+      userChrome = ''
+        ${builtins.readFile "${firefox-gx}/chrome/userChrome.css"}
+        ${builtins.readFile ./custom.css}
+      '';
+      userContent = builtins.readFile "${firefox-gx}/chrome/userContent.css";
       extraConfig = builtins.readFile "${firefox-gx}/user.js";
+
       settings = {
         # Open previous windows and tabs
         "browser.startup.page" = 3;
 
         # Prefs
+        "layout.css.devPixelsPerPx" = 1.15;
+        "browser.tabs.firefox-view" = false;
         "browser.search.widget.inNavBar" = true;
         "browser.toolbars.bookmarks.visibility" = "always";
+        "browser.toolbars.bookmarks.showInPrivateBrowsing" = true;
 
         # remove telemetry
         "datareporting.policy.dataSubmissionEnabled" = false;