Issue 6889 - Upgrade adblockpluscore to 9ebb3381fcde and integrate the changes.

lib/utils.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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 38 matching lines @@
     // This fallback is only necessary for Microsoft Edge
     if (!direction)
       direction = /^(?:ar|fa|he|ug|ur)\b/.test(this.appLocale) ? "rtl" : "ltr";
     Object.defineProperty(
       this,
       "readingDirection",
       {value: direction, enumerable: true}
     );
     return this.readingDirection;
   },
-  generateChecksum(lines)
-  {
-    // We cannot calculate MD5 checksums yet :-(
-    return null;
-  },
 
   getDocLink(linkID)
   {
     let docLink = require("./prefs").Prefs.documentation_link;
     return docLink.replace(/%LINK%/g, linkID)
                   .replace(/%LANG%/g, Utils.appLocale);
   },
 
   yield()
   {
   }
 };