Opened on 08/03/2015 at 07:07:20 PM

Closed on 03/07/2016 at 12:41:10 PM

Last modified on 04/25/2016 at 02:43:36 AM

#2850 closed defect (fixed)

Two Firefox windows open when clicking on an external link

Reported by: enviroplanter Assignee: trev
Priority: P2 Milestone:
Module: Automation Keywords:
Cc: trev, greiner, mapx, fhd Blocked By:
Blocking: #2444 Platform: Firefox
Ready: yes Confidential: no
Tester: Ross Verified working: yes
Review URL(s):

Description (last modified by greiner)


Adblock Plus 2.6.10, Firefox 39.0, OS X 10.10.4

How to reproduce

  • Quit Firefox if necessary
  • Click on an external link (e.g. from Apple Mail or Apple Contacts)

Observed behaviour

2 windows open--one is the link and the other is the Firefox home page. Removing Adblock Plus corrects the problem. Problem just started with 2.6.10.

Expected behaviour

Only the link window is expected.

forum thread:

Attachments (0)

Change History (15)

comment:1 Changed on 08/03/2015 at 08:12:48 PM by enviroplanter

Note: This happens when Firefox is not open prior to clicking on the external link.

comment:2 Changed on 08/04/2015 at 03:01:28 PM by mapx

  • Cc trev greiner mapx added

comment:3 Changed on 08/04/2015 at 03:02:17 PM by mapx

  • Component changed from Unknown to Adblock-Plus-for-Firefox
  • Description modified (diff)

comment:4 Changed on 08/04/2015 at 03:58:13 PM by greiner

  • Description modified (diff)

I was able to reproduce this issue with the environment below but no success on Windows 8.1 or Ubuntu 14.04.

Adblock Plus 2.6.10
Firefox 39
OSX 10.8 and 10.10

I also noticed that when opening Firefox through the command line using open it would open the webpage only if Firefox was still open and a single empty window otherwise.

comment:5 Changed on 08/05/2015 at 09:13:51 AM by greiner

  • Cc fhd added

The last good build was so this regression appears to have been introduced by #2438.

comment:6 Changed on 03/06/2016 at 05:27:51 PM by jshrek

I can confirm this issue still occurs on OSX 10.11.3 with Firefox 44.0.2 and AdblockPlus 2.7.2

comment:7 Changed on 03/07/2016 at 11:46:07 AM by trev

  • Priority changed from Unknown to P2
  • Ready set

Yes, I can see this as well. I'm running the following command:

open -a /Applications/

This opens two windows as reported. However, I had to disable lots of extensions in order to have this fixed - e.g. Element Hiding Helper triggers the same issue.

I'm pretty certain that the problem here is a timing change due to prefs.js producing a synchronous XMLHttpRequest at startup.

comment:8 Changed on 03/07/2016 at 11:47:04 AM by trev

  • Blocking 2444 added

comment:9 Changed on 03/07/2016 at 12:15:23 PM by trev

  • Component changed from Adblock-Plus-for-Firefox to Build-and-Release-Tools
  • Owner set to trev

comment:10 Changed on 03/07/2016 at 12:30:36 PM by trev

  • Review URL(s) modified (diff)
  • Status changed from new to reviewing

comment:11 Changed on 03/07/2016 at 12:40:21 PM by abpbot

A commit referencing this issue has landed:

comment:12 Changed on 03/07/2016 at 12:41:10 PM by trev

  • Resolution set to fixed
  • Status changed from reviewing to closed


I'll create additional issues on getting this into all relevant extensions via build tools update.

comment:13 Changed on 03/07/2016 at 01:03:51 PM by abpbot

A commit referencing this issue has landed:

comment:14 Changed on 03/07/2016 at 03:16:54 PM by trev

I created #3743, #3744, #3746, #3747, #3748 on dependency updates for all the relevant extensions.

comment:15 Changed on 04/25/2016 at 02:43:36 AM by Ross

  • Tester changed from Unknown to Ross
  • Verified working set

Firefox 38 / 44 / OS X 10.11

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