Mouse is dissapearing on Firefox (RHEL) when not in fullscreen and not hovering over the video container

[ji-podhead]

I know that this things happen in Firefox due to compatibility issues, but this is extremely annoying.
Sometimes the youtube tab hides my mouse as soon as it hovers over it. Idk why, but i guess that the tab saves a flawed state of the mouse position and the hide/unhidden status.
Sometimes i even have to press mouse 1 to get it back, even if its not hovered over the yt tab.

So this goes beyond just the yt experience.

Thanks in advance:

ji