Issue 1663 - Various Firefox-related changes of the first-run page

messageResponder.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 Eyeo GmbH
  *
  * Adblock Plus 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.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 (function(global)
 {
-  if (typeof ext == "undefined")
+  if (!global.ext)
     global.ext = require("ext_background");
 
   var Utils = require("utils").Utils;
   var FilterStorage = require("filterStorage").FilterStorage;
   var FilterNotifier = require("filterNotifier").FilterNotifier;
   var defaultMatcher = require("matcher").defaultMatcher;
   var BlockingFilter = require("filterClasses").BlockingFilter;
   var Synchronizer = require("synchronizer").Synchronizer;
 
   var subscriptionClasses = require("subscriptionClasses");
@@ skipping 142 matching lines @@
         }
 
         if (message.filter)
           filters.subscription = message.filter;
         else
           delete filters.subscription;
         break;
     }
   });
 })(this);