After an update at the end of November, this problem started. Every video on YouTube or streaming, Twitch, Kick, when I try to put it in full screen, a strip appears in the left corner, making it possible to see the wallpaper. It's as if the site is in windowed mode and is being dragged to the right. This problem is very annoying, and there have been about 4 or 5 Firefox updates and they haven't fixed it. I've been using this browser for about 20 years now, if I'm not mistaken I witnessed its launch, and I've been a Windows user since version 3.11, that is, I've used every version of Windows on the market, used almost every browser, messenger, etc... Firefox used to be better, but it seems to be declining in quality. I expected more.
