At one point I was switching back and forth, because I'd see a general decline in Firefox for some reason. I don't know if it was just getting overloaded with extensions that were hitting its performance or if my machine itself was having problems or if Firefox's performance was shit for awhile, but I'd switch from Firefox to Chrome, try going back to Firefox, then back to Chrome, but I've been with Firefox for a good few years now without issue. The browser "market" is even crowded now, there's no reason to go back to Chrome, since there's so many other choices out there (though avoiding Chromium might be a little bit trickier).