Issue 2664 - Remove ignoreHeaders argument from parseFilter(s) and move the logic to the UI

background.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
@@ skipping 352 matching lines @@
       // The browser action popup asks us this.
       if(sender.page)
       {
         sendResponse({enabled: !isPageWhitelisted(sender.page)});
         return;
       }
       break;
     case "add-filters":
       var result = parseFilters(msg.text);
 
-      if (result.error)
+      if (result.errors.length > 0)
       {
-        sendResponse({status: "invalid", error: result.error});
+        sendResponse({status: "invalid", error: result.errors.join("\n")});
         break;
       }
 
       for (var i = 0; i < result.filters.length; i++)
         FilterStorage.addFilter(result.filters[i]);
 
       sendResponse({status: "ok"});
       break;
     case "add-subscription":
       ext.showOptions(function(page)
@@ skipping 36 matching lines @@
       break;
   }
 });
 
 // update icon when page changes location
 ext.pages.onLoading.addListener(function(page)
 {
   page.sendMessage({type: "clickhide-deactivate"});
   refreshIconAndContextMenu(page);
 });