[deedub]

Maybe more related to youtube than I thought, but I have trouble closing tabs and firefox with 15 or 20 tabs would eat all my CPU. Pages loaded much slower and the experience across the board was often pretty poor. I had to go back to Chrome and I don't miss FF at all. I tried.

[brokenmachine]

That is not my experience. I use FF exclusively, I can't remember the last time I used Chrome.

I have over 1200 tabs open at the moment, including at least 100 youtube tabs, and mine runs fine even with a bunch of other stuff running.

I do find that if I go over 150 windows open then things start to become problematic, but I think that's because my GPU is only 8Gb.

CPU is usually at about 10% on an i7-12900k.