Issue on auto-hide cursor in certain full screen web videos

[Duke_Fleed]

Cursor doesn't hide when videos run in full screen video mode in certain web pages in Firefox, unlike other browsers such as Edge or Chrome. 1st example: raiplay.it on streaming; discoveryplaus.com both streaming and non-streaming full screen videos. Auto-hide works for full screen youtube videos.

[CLampe]

Today Firefox updated to 123.0b1 and stopped hiding the mouse cursor on YouTube for me on Ubuntu 22.04. Hope it gets fixed before next stable release.