For me Firefox crashes all the time in normal use. I am talking minimum twice a day. It also has this weird problem where it will pin one thread to 100% and lock up the whole browser when downloading files. I also had to disable video hardware acceleration or else Twitch crashes every 5-10 minutes but luckily my CPU is so strong that it’s not too big of a deal to do software decoding.
I still use it out of principle but it has been a way worse experience than Chromium ever was for me.