Visual glitch with video player.

[ghost]

Whenever you fastforward with the video player, you get this visual glitch
300926609-858bb22a-fd81-45bf-b9bf-a22ca903ce94.webm
It happens in aniwatch.to , 2movieorca , lookmovie2.to and fmovies, it seems these website use the same video player and therefore are trouble by these issues.

[ghost]

I should also mention it, that only happens with firefox or any of its forks, not with the chrome based browsers.

[joakim-tjernlund]

try with just released 2.4.1

[ghost]

I would do that if I knew as to how to install it myself, for some reason waterfox (firefox fork I'm using) doesn't want to update to the newest version, could you please tell me in the nutshell as to how to install it myself?