Firefox in particular has historically had some issues. When did you try it? This is a post from 2016 mentioning a few of the performance issues at the time: ht

Firefox in particular has historically had some issues. When did you try it? This is a post from 2016 mentioning a few of the performance issues at the time: https://flak.tedunangst.com/post/firefox-vs-rthreads https://flak.tedunangst.com/post/firefox-vs-rthreads Some have since been fixed, though no doubt others have arisen, since Firefox is something of a moving target.