I’ve been using FF for more years than I care to remember, and with the exception of a couple of sites that weren’t really that important, I’ve never had an issue. I certainly never had an issue running uBlock Origin and YouTube.
I flat out refuse to use anything even loosely based on Chromium on principal alone.
Did my part. If I have to run Windows along with a root kit to play a game, I’ll stick to Linux.
TBH, the game wasn’t really that great to begin with.