I use Firefox because they don't threaten to shut down power user extensions every few years. I find it faster and more reliable because it doesn't chew all of my RAM and lead to swap / early-oom-kill.

I'm quite confused by folks' opinion of Firefox in this thread because my only problem with it is that maybe once per year (or less) I find an online checkout that is subtly broken in it (sometimes it's just my adblocker). But I have occasionally found sites that are inverse, only working in Firefox.