disable acceptable ads from first run page

lib/ui.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 698 matching lines @@
     {
       try
       {
         existing.focus();
       } catch (e) {}
       if (filter)
         existing.SubscriptionActions.selectFilter(filter);
     }
     else
     {
-      Services.ww.openWindow(null, "chrome://adblockplus/content/ui/filters.xul", "_blank", "chrome,centerscreen,resizable,dialog=no", {wrappedJSObject: filter});
+      let {application} = require("info");
+      if (application == "fennec2")
+      {
+        Cu.import("resource://gre/modules/Prompt.jsm");
+        let hasAcceptableAds = FilterStorage.subscriptions.some(function(subscription) subscription instanceof DownloadableSubscription && subscription.url == Prefs.subscriptions_exceptionsurl);
+        let promtSettings =
+        {
+          title: Utils.getString("disable_aa_promt_title"),
+          message: Utils.getString("disable_aa_promt_msg_already")
+        };
+        
+        if (hasAcceptableAds)
+        {
+          promtSettings["buttons"] = [Utils.getString("disable_aa_promt_ok"), Utils.getString("disable_aa_promt_cancel")];
+          promtSettings["message"] = Utils.getString("disable_aa_promt_msg");
+        }
+        
+        new Prompt(promtSettings).show(function(data) 
+        {
+          if (data.button == 0)
+            UI.toggleAcceptableAds();
+        });
+      }
+      else
+        Services.ww.openWindow(null, "chrome://adblockplus/content/ui/filters.xul", "_blank", "chrome,centerscreen,resizable,dialog=no", {wrappedJSObject: filter});
     }
   },
 
   /**
    * Opens report wizard for the current page.
    */
   openReportDialog: function(/**Window*/ window)
   {
     let wnd = Services.wm.getMostRecentWindow("abp:sendReport");
     if (wnd)
@@ skipping 1187 matching lines @@
   ["abp-command-contribute", "command", UI.openContributePage.bind(UI)],
   ["abp-command-contribute-hide", "command", UI.hideContributeButton.bind(UI)]
 ];
 
 onShutdown.add(function()
 {
   for (let window in UI.applicationWindows)
     if (UI.isBottombarOpen(window))
       UI.toggleBottombar(window);
 });