Closed Bug 1535661 Opened 5 years ago Closed 5 years ago

Markup panel is empty apart from HTML tag


(DevTools :: Inspector, defect, P1)

62 Branch


(firefox68 fixed)

Firefox 68
Tracking Status
firefox68 --- fixed


(Reporter: miker, Assigned: miker)



(1 file)


  1. Go to
  2. Open the inspector
  3. Reload the page

The following exception is raised:

Error while calling actor 'domwalker's method 'children' Permission denied to access property "jQuery300023229982312416421" protocol.js:1042:13

We are trying to access a dead node somewhere and that is breaking the world.

In this case the page is loading a Twitter widget and we recurse into the iframe checking each node for events. The Twitter widget has a jQuery event but because of CORS we have no access to the script, a Security exception is thrown and the world is broken.

One change is in node.js::isScrollable() so I decided to assign this to you for review. Feel free to re-assign as you feel appropriate if you don't have time.


Attachment #9051536 - Attachment description: Bug 1535661 - Markup panel is empty apart from HTML tag r?pbro! → Bug 1535661 - Fix CORS issues in Markup Panel r?pbro!
Pushed by
Fix CORS issues in Markup Panel r=pbro
Closed: 5 years ago
Resolution: --- → FIXED
Target Milestone: --- → Firefox 68

Mike, this was filed and marked as a P1 just before merge Day so it in 68. Would that be something we should uplift to 67 beta?

Flags: needinfo?(mratcliffe)

To be honest it is an edge case so lets leave it.

If we receive any reports we can always uplift to beta later.

Flags: needinfo?(mratcliffe)

As per the discussion with Mike on Slack website has changed.
Removing QE+ since preparing a TC for it would involve to much time investment.

Flags: qe-verify+
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