Closed Bug 1610613 Opened 4 years ago Closed 4 years ago

Make always-on-top windows persist across workspaces


(Core :: Widget: Cocoa, defect, P3)




Tracking Status
firefox76 --- fixed
firefox77 --- fixed


(Reporter: mconley, Assigned: mconley)


(Blocks 1 open bug)



(1 file)

For Picture-in-Picture, we use an always-on-top window to keep the video player on top of other applications.

For users that use workspaces on macOS, this is only a half-measure, since it's easy to lose the player window between workspaces. Ideally, the player window should persist between workspaces.

Chromium is able to do this with their non-native player window, so we can likely leverage the same technique.

Blocks: videopip

The priority flag is not set for this bug.
:spohl, could you have a look please?

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Flags: needinfo?(spohl.mozilla.bugs)
Flags: needinfo?(spohl.mozilla.bugs)
Priority: -- → P3

I just rechecked in latest Dev Edition. The way picture-in-picture is implemented is of no use to a mac user if he is using apps in fullscreen mode and across multiple workspaces.
Picture-in-picture should behave like Helium does. For reference see

Besides that... Great Feature!

Assignee: nobody → mconley
Pushed by
Make Picture-in-Picture window persist across workspaces on macOS. r=spohl

I have to add that this is a problem on windows too if you use the virtual desktops.

Closed: 4 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla77

Comment on attachment 9138719 [details]
Bug 1610613 - Make Picture-in-Picture window persist across workspaces on macOS. r?spohl!

Beta/Release Uplift Approval Request

  • User impact if declined: Users on macOS using Picture-in-Picture not be able to view the player window on multiple virtual desktops simultaneously.
  • Is this code covered by automated tests?: No
  • Has the fix been verified in Nightly?: Yes
  • Needs manual test from QE?: No
  • If yes, steps to reproduce:
  • List of other uplifts needed: None
  • Risk to taking this patch: Low
  • Why is the change risky/not risky? (and alternatives if risky): This is a very small, well-contained patch that changes a bit on the Picture-in-Picture player window when communicating with macOS. It doesn't effect any other kind of window.
  • String changes made/needed: None.
Attachment #9138719 - Flags: approval-mozilla-beta?

Comment on attachment 9138719 [details]
Bug 1610613 - Make Picture-in-Picture window persist across workspaces on macOS. r?spohl!

Approved for 76.0b5.

Attachment #9138719 - Flags: approval-mozilla-beta? → approval-mozilla-beta+
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