I tried using it daily as you do, but youtube had stability issues in Chromium and Firefox for ages, so now I rarely use it. When it works, great, when not, I'm not spending any more time trying to figure out why.
it stands up to stress/linpack, I've the flirc case & and official adapter. It may be something to do with trying to accelerate video. Otherwise it has never crashed.
I suspect it's a compilation flag that this ubuntu distro has set correctly that RpiOS has not, I also see some about:config messing to try for another time.
I've had much better luck and performance using yt-dlp and mpv to watch YouTube videos on a Pi. It isn't an amazing experience as you would imagine but it is much better than trying to do it in the browser.
https://forums.raspberrypi.com/viewtopic.php?t=323782
https://forums.raspberrypi.com/viewtopic.php?t=323640&start=...