Found in

• 107.0b4

Affected versions

• 106.0.1, 107.0b4, 108.0a1 (2022-10-25)

Tested platforms

• Affected platforms: Windows 10, Windows 7, macOS 11, Ubuntu 20.

Steps to reproduce

1. Access the following website: https://www.hulu.com/
2. Play any video, enable CC subtitles and minimize the video (see the video attached)
3. From the minimized window trigger the PiP window

Expected result

• 1. It shouldn't be possible to trigger the firefox PiP window from another PiP window.
  2. The subtitles should work in the firefox PiP window.

Actual result

• 1. The firefox PiP window can be triggered from another PiP window.
  2. The subtitles don't work in the firefox PiP window.

Regression range
Will search deeper for a regression range as soon as possible. For now, I can reproduce it in Fx96 as well.

Please let me know if separate bugs are needed for the issues described.

We tried to find a regression range but unfortunately older builds than 2021 are unable to play Hulu content and we could reproduce this bug up until then.

Considering the comment above and the fact that the subtitles are a rather fresh feature, we can safely assume this is not a regression.