Open Bug 1630005 Opened 4 months ago Updated 1 day ago

Support debug target navigation when fission is enabled


(DevTools :: about:debugging, task, P3)



(Fission Milestone:M7)

Fission Milestone M7


(Reporter: mtigley, Unassigned)


(Blocks 1 open bug)


(Whiteboard: dt-fission)

When navigating to another domain, DevTools will be broken because the target will be closed as a result of Bug 1617237. We should fix this.

Thanks for filing!

The following bug might be relevant here: Bug 1618695 - stop destroying TabDescriptor when navigating to another process. Once the TabDescriptor can survive across process change, we can also make the toolbox use a descriptor instead of a target and it could help to support target switching here.

Or we can implement a custom support for target-switching at

Tracking Fission DevTools bugs for Fission Nightly (M6) milestone

Fission Milestone: --- → M6

Additional testing that should be done to ensure that debug target navigation survives a process change: we should make sure that navigation to about: pages from another external domain will not crash the tab. An example of this:

  1. Go to in another tab.
  2. Open remote debugging for that particular tab.
  3. In that same tab, go to about:robots

Right now, this will crash the tab remote debugging tab with an error: Cannot connect to the debug target. See error details below.

Type: defect → task

Adding dt-fission whiteboard tag to DevTools bugs that mention Fission or block Fission meta bugs but don't already have a dt-fission whiteboard tag.

Whiteboard: dt-fission

Moving these DevTools Fission bugs from Fission's old M6 Nightly milestone to M7 Beta. I am assuming these bugs would have the dt-fission-m2-mvp whiteboard tag if they were Fission Nightly blockers.

Fission Milestone: M6 → M7
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