Issue 3991 - Fixed logic setting homepage URL automatically

lib/synchronizer.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 198 matching lines @@
       let url;
       try
       {
         url = new URL(params.homepage);
       }
       catch (e)
       {
         url = null;
       }
 
-      if (url && (url.protocol == "http" || url.protocol == "https"))
+      if (url && (url.protocol == "http:" || url.protocol == "https:"))
         subscription.homepage = url.href;
     }
 
     if (params.title)
     {
       subscription.title = params.title;
       subscription.fixedTitle = true;
     }
     else
       subscription.fixedTitle = false;
@@ skipping 85 matching lines @@
             let data = "[Adblock]\n" + subscription.filters.map((f) => f.text).join("\n");
             redirectCallback("data:text/plain," + encodeURIComponent(data));
           }
         }, false);
         request.send(null);
       }
     }
   },
 };
 Synchronizer.init();