I used Firefox and Chrome simultaneously every day for many years on everything from a low-end laptop to pretty quick desktop. Firefox for personal stuff, Chrom

I used Firefox and Chrome simultaneously every day for many years on everything from a low-end laptop to pretty quick desktop. Firefox for personal stuff, Chrome for work. Speed's always been similar for me, Firefox has generally been more reliable (partly due to being able to block so much crap, probably). Chrome used to break with alarming regularity and need a total reinstall. Sometimes there was a site which wasn't compatible with Firefox, and if I needed it I'd open it in a Chrome incognito window. These days I've switched to Vivaldi for the work stuff (vertical tabs, "hibernate background tabs", tiling!), though I still debug JS in Chrome.