I kinda jumped ship to Waterfox, but there's something there that's driving me crazy and I can't seem to figure out why mine is different from others'...so I may be going back. >,>
Every time I've left Firefox I come back because it just...runs the best for me. And it doesn't do shady things like google browsers constantly running their metrics...
FF is also a resource hog. Waterfox is "Firefox before it got stupid" and also a Mozilla product. My only complaint with it right now is that...you know how you can hover over a link and in the bottom left