I stopped having the same issue of 100s of tabs of "math videos that I was going to watch one day" when I started saving them in my private playlists. Now I just have 100s of videos in playlists that I just look at longingly but never watch.
lol I tried that once.
What works best for me now is to do my best at putting tabs in the correct group tbh most gather while debugging and then I can just kill the group when I'm done.
Problem is the ADHD and groups get contaminated. Mostly a few casualties is actually fine but sometimes the group gets too mixed. Eventually I nuke it all
My Linux desktop is hooked up to my TV[0] and currently has over 100 YouTube tabs open. I'm going to watch those math videos, I swear, I'm just tired right now and so want to watch garbage.
I do have ublock origin on both machines and some stricter privacy settings, maybe that's it? But otherwise yeah, FF is just as snappy as chrome. Which I do use regularly when on other people's machines.
[0] it's a movie server, gaming machine, and for everything else there's ssh and ydotool (I wish Apple would let me make better iPhone scripts than Shortcuts allows. Shortcuts makes me want to throw my phone against a wall...)