Issue 4681 - Move URL Fixer first-run page into the extension

lib/main.js

 /*
  * This file is part of the URL Fixer,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * URL Fixer is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * URL Fixer is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 57 matching lines @@
   }
 
   let window = Services.wm.getMostRecentWindow("navigator:browser");
   if (!window)
     return;
 
   let oldVersion = Prefs.version;
   Prefs.version = require("info").addonVersion;
   if (!oldVersion || isMajorUpdate(oldVersion, Prefs.version))
   {
-    let url = "http://urlfixer.org/firstrun/?v=" + Prefs.version;
+    let url = "chrome://url-fixer/content/firstrun/index.html";
     if (oldVersion)
       url += "&update=1";
     if ("Browser" in window && typeof window.Browser.addTab != 'undefined')
     {
       // window.Browser.addTab(url, true);
       // No firstrun on Fennec.
     }
     else if ("gBrowser" in window)
       window.gBrowser.loadOneTab(url, {inBackground: false});
   }
 
   require("typoCollector").onBrowserInitialized(window);
 }