Issue 3222 - Improve JSDoc comments

lib/requestNotifier.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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/>.
  */
 
 /**
  * @fileOverview Stores Adblock Plus data to be attached to a window.
  */
 
 let windowSelection = new WeakMap();
 let requestNotifierMaxId = 0;
 
 /**
  * Active RequestNotifier instances by their ID
- * @type Map
+ * @type Map.<number,RequestNotifier>
  */
 let notifiers = new Map();
 
 let messageManager = Cc["@mozilla.org/parentprocessmessagemanager;1"]
                        .getService(Ci.nsIMessageListenerManager)
                        .QueryInterface(Ci.nsIMessageBroadcaster);
 messageManager.addMessageListener("AdblockPlus:FoundNodeData", onNodeData);
 messageManager.addMessageListener("AdblockPlus:ScanComplete", onScanComplete);
 
 onShutdown.add(() => {
@@ skipping 152 matching lines @@
       node = node.parentNode;
     }
     else
     {
       node = null;
     }
   }
 
   return null;
 };