about youtube being totally unusable on firefox: is it just youtube/google being evil as is customary or also firefox having loads of memory leaks, as its usual too? (plenty of mem leak bugs with video/audio reported over the years, many very recent and still open)
I was about to write that YouTube works flawlessly for me in Firefox on Mac, but I just upgraded to a monster of a M4 MBP, so it's probably just overcoming these issues (malicious or otherwise) via brute force.
Firefox+uBO on Fedora/W11 here, with Firefox being my primary browser for close to 8 years. I only run in to an issues maybe once a year, where I have to pop open Edge/Chrome for some random edge cases to work. I've used Firefox on dodgy, overly burdened and hacked together systems with no issues that were memorable.
The only problem I really remember is at one point Firefox having issues under linux when NVIDIA was swapping their main driver over to the "open-sourced" version, there was some performance issues with decoding, not unusable - but it was resolved within a week.
Firefox + ublock origin seems to be the combo allowing me the best user experience with youtube. I have no idea what the previous poster is talking about really.
YouTube works perfectly on Firefox if you pay for YouTube Premium. Haven't noticed any bugs, if it leaks memory or something it's not noticeable on my machine.