Proud firefox convert. I used chrome for quite a number of years, but their quantum update convinced me to move (though I've seen other posts mentioning it was seriously buggy at first, I didn't switch right away). As others have mentioned, containers are a bit of a killer app. Plus, firefox is going to keep ad-blocker support. It's not perfect, and chrome is probably more stable. I've gotten memory leaks, crashes (mostly on mobile), and one weird resize issue on i3. However, none of them are critical, and I'm willing to put up with them to avoid google's cancerous garbage.

Also, I never thought I'd say this, but good on Apple for maintaining webkit. It's a darn good engine, and I'm happy to have a third player. Plus, it's easier to wrap it with your own custom browser (see surf).

There's one piece of feedback; I wish people could do with firefox what they do with chrome. Maybe then the next cool browser could be based on firefox.