feat: add WaterfoxGlue to handle Waterfox specific code

(cherry picked from commit 64e891c226dc7a28b490779c6e75101349ff3f7b)

browser/components/BrowserGlue.sys.mjs

@@ -80,6 +80,7 @@ ChromeUtils.defineESModuleGetters(lazy, {
     "resource:///modules/WebProtocolHandlerRegistrar.sys.mjs",
   WindowsRegistry: "resource://gre/modules/WindowsRegistry.sys.mjs",
   setTimeout: "resource://gre/modules/Timer.sys.mjs",
+  WaterfoxGlue: "resource:///modules/WaterfoxGlue.jsm",
 });
 
 XPCOMUtils.defineLazyServiceGetters(lazy, {
@@ -429,6 +430,8 @@ BrowserGlue.prototype = {
   _beforeUIStartup: function BG__beforeUIStartup() {
     lazy.SessionStartup.init();
 
+    WaterfoxGlue.init();
+
     // check if we're in safe mode
     if (Services.appinfo.inSafeMode) {
       Services.ww.openWindow(

waterfox/browser/components/WaterfoxGlue.jsm

@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const EXPORTED_SYMBOLS = ["WaterfoxGlue"];
+
+const WaterfoxGlue = {
+  init() {},
+};

waterfox/browser/components/moz.build

@@ -0,0 +1,9 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+EXTRA_JS_MODULES += [
+    "WaterfoxGlue.jsm",
+]

waterfox/browser/moz.build

@@ -5,6 +5,7 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DIRS += [
+    "components",
     "extensions/common",
     "themes",
     ]