Issue 1724 - Fixed memory leak in messaging code, when no response is sent, on Safari

chrome/ext/background.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
@@ skipping 307 matching lines @@
         frame = frames[frameId] || frames[Object.keys(frames)[0]];
 
         if (frame)
         {
           // Since Chrome 38 requests of type 'object' (e.g. requests
           // initiated by Flash) are mistakenly reported with the type 'other'.
           // https://code.google.com/p/chromium/issues/detail?id=410382
           if (requestType == "other" && parseInt(navigator.userAgent.match(/\bChrome\/(\d+)/)[1], 10) >= 38)
             requestType = "object";
 
-          if (!ext.webRequest.onBeforeRequest._dispatch(details.url, requestType, new Page({id: details.tabId}), frame))
+          var results = ext.webRequest.onBeforeRequest._dispatch(
+            details.url,
+            requestType,
+            new Page({id: details.tabId}),
+            frame
+          );
+
+          if (results.indexOf(false) != -1)
             return {cancel: true};
         }
       }
 
       if (isMainFrame || details.type == "sub_frame")
         frames[details.frameId] = {url: details.url, parent: frame};
     }
     catch (e)
     {
       // recent versions of Chrome cancel the request when an error occurs in
@@ skipping 78 matching lines @@
             callback(new Page(tab));
         }
         else
         {
           ext.pages.open(optionsUrl, callback);
         }
       });
     });
   };
 })();