Add gnome shell extensions plugin for browsers

pkgs/desktops/gnome-3/3.12/core/gnome-shell/default.nix

@@ -39,11 +39,16 @@ stdenv.mkDerivation rec {
 
     wrapProgram "$out/libexec/gnome-shell-calendar-server" \
       --prefix XDG_DATA_DIRS : "${evolution_data_server}/share:$out/share:$XDG_ICON_DIRS:$GSETTINGS_SCHEMAS_PATH"
+
+    echo "${unzip}/bin" > $out/${passthru.mozillaPlugin}/extra-bin-path
   '';
 
-
   enableParallelBuilding = true;
 
+  passthru = {
+    mozillaPlugin = "/lib/mozilla/plugins";
+  };
+
   meta = with stdenv.lib; {
     platforms = platforms.linux;
   };

pkgs/top-level/all-packages.nix

@@ -9924,6 +9924,7 @@ let
           ++ lib.optional (supportsJDK && cfg.jre or false && jrePlugin ? mozillaPlugin) jrePlugin
           ++ lib.optional (cfg.enableGoogleTalkPlugin or false) google_talk_plugin
           ++ lib.optional (cfg.enableFriBIDPlugin or false) fribid
+          ++ lib.optional (cfg.enableGnomeExtensions or false) gnome3.gnome_shell
          );
       libs = [ gstreamer gst_plugins_base ] ++ lib.optionals (cfg.enableQuakeLive or false)
              (with xlibs; [ stdenv.gcc libX11 libXxf86dga libXxf86vm libXext libXt alsaLib zlib ]);