I use Firefox at home and on my phone. I still use chrome at work because of habit and because that's what most users use. Some of the other guys use Firefox anyway. Its dev tools seem fine.

I am going to be downvoted to hell for this. I use Mullvad Browser/LibreWolf on desktop but on Android I prefer Chromium. I was using Firefox until a couple months ago when I switched back to Vanadium/Cromite. Chromium on Android is very nice. First it has Material You support so it looks much better than Firefox. Second, it loads website faster and it scrolls buttery smooth unlike the noticeably choppier Firefox. Plus it has 120hz on the privacy preserving forks unlike Firefox which is stuck on 60hz with RFP on. Third, Chromium has per-site process isolation on Android so it has better security. I probably won't be switching back until Firefox catches up on those fronts.