Hello,

TLDR: How to open all facebook videos in 1 PIP window, or/and auto-close PIP if video ends, or/and disable autoplay, or/and disable mute or just remember mute state.

I'm watching multiple short videos on facebook (without account) and I have few problems:

Videos are too small, but I can't switch to fullscreen, because I lose position, so I'd have to scroll too much every time, so the only way to have larger size is PIP, but I have the problems.

Another problem while playing videos, they start playing automatically, mute enabled, so I have to disable mute and rewind every time.

When I open 1st PIP window for 1st video, it's opened in large PIP window, but when I open 2nd video, it's opened in 2nd PIP window, next to previous, so I have to manually close the 1st PIP and move 2nd PIP, every time.

Perfect solution would be:

• disable autoplay for facebook videos
• always disable mute for videos, or remember mute state per session
• auto-close PIP window if video ends or open another video always in the same window

I already tried:

• google
• bing AI
• about:config option media.videocontrols.picture-in-picture.allow-multiple set to false and true, restart firefox
• other about:config options for pip

Is there any way to open all videos in the same PIP window and not in multiple PIP windows, using any option or even extension, please?
Workaround could be to auto-close PIP window if video ends.

EDIT: Now I have another problem, PIP button is not shown for each facebook video, even the same length, with the same settings, I tried to switch some about:config settings, change them all to default values, but PIP button is shown just for some videos, it looks random.

Firefox 116.0.2 (64-bit), tested with the Nightly 118.0a1 (2023-08-12) (64-bit), default settings without extensions, Windows 10 22H2 64-bit.