Opened on 09/01/2018 at 01:03:12 PM

Closed on 08/29/2019 at 05:43:18 PM

Last modified on 10/01/2019 at 12:27:30 PM

#6917 closed defect (rejected)

Iframe collapsing doesn't work on Firefox

Reported by: mjethani Assignee:
Priority: Unknown Milestone:
Module: Platform Keywords: closed-in-favor-of-gitlab
Cc: tschuster, sebastian Blocked By:
Blocking: Platform: Firefox
Ready: no Confidential: no
Tester: Unknown Verified working: no
Review URL(s):



adblockpluschrome next branch as of changeset 0954083e568e
Firefox 61

How to reproduce

  1. Follow the instructions at

Observed behaviour

The request for the iframe appears to be blocked (verify in DevTools panel), but the iframe itself remains visible.

Expected behaviour

The iframe should be "collapsed" (hidden) after the request is blocked.

Additional notes

It seems the content script is not getting the error event from the iframe; oddly it gets an error event from the link element (style sheet), even though the style sheet is loaded correctly.

This issue occurs on Firefox only.

Attachments (0)

Change History (4)

comment:1 Changed on 09/01/2018 at 04:13:14 PM by sebastian

  • Cc tschuster sebastian added

Frames don't get an error event on Chrome either, but we account for that by handling the load event as well specifically for frames. However, it seems on Firefox, if a frame is blocked, neither a load nor an error event is triggered. That is quite certainly a bug in Firefox.

I don't see any error event for the stylesheet.

comment:2 Changed on 09/03/2018 at 02:40:36 PM by sebastian

Thanks for filing a Firefox bug, Tom!

comment:3 Changed on 08/29/2019 at 05:43:18 PM by sebastian

  • Keywords closed-in-favor-of-gitlab added
  • Resolution set to rejected
  • Status changed from new to closed

Sorry, but we switched to GitLab. If this issue is still relevant, please file it again in the new issue tracker.

comment:4 Changed on 10/01/2019 at 12:27:30 PM by Ross

I've filed the issue again on GitLab: #90

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