Note

• When the user opens the browser with wayland window protocol, loads a youtube video and clicks the "Watch in Picture-in-Picture" button and then grabs the vertical or horizontal margins (not the corners) and attempts to enlarge it, he will notice that the PIP window won't resize.

Affected versions

• Nightly v96.0a1

Affected platforms

• Ubuntu 21 + wayland

Steps to reproduce

1. Launch browser with wayland window manager:
   a. Go into the nightly folder.
   b. Right-click and "Open in Terminal".
   c. MOZ_ENABLE_WAYLAND=1
   d. ./firefox
2. Load https://www.youtube.com/watch?v=SXr8Rb97nIk
3. Click the "Watch in Picture-in-Picture" button.
4. Grab a vertical or horizontal margin and enlarge the PIP window.

Expected result

• The PIP frame is resized correctly.

Actual result

• The PIP video is not being resized as expected.

Regression range

• unknown.

Additional notes

• This issue occurs with "wayland" Window Protocol and not with "xwayland".

Yes, I can reproduce it. We may rework the PIP on Wayland a bit. The PIP is missing shadows and can be only downsized. To enlarge you need to use corners.

This is still reproductible. Martin, it looks like the Atlassian ticket is inaccessible to me, can you share if there has been updates there?

(In reply to Alexandre LISSY :gerard-majax from comment #4)

This is still reproductible. Martin, it looks like the Atlassian ticket is inaccessible to me, can you share if there has been updates there?

I don't have access to it. Tested latest nightly and the PIP window can be resized by sides, not just corners.

I do repro the issue on my ubuntu system.

I can reproduce it too. I wonder why it worked before.

This bug is not restricted to snap.

It is possible to increase the size a few pixels at a time by alternating between the horizontal and vertical edges, it stops when the other dimension needs to grow. Single-edge resizing worked before the aspect ratio lock (Bug 1583737) but it just added letterboxing instead of making the other dimension grow.