I switched to FF when Quantum came out. I use it exclusively. Not because I hate Chrome, but because I don't see any need for chrome. Once in a while I see a website that forces me to use something other than FF. But it happens rarely, and it is mostly some webgl-based under-development demo website.

I even use it on my phone. The mobile version is definitely worse than Chrome, but it has plugins (or it used to! nowadays it only support a few popular ones which is a shame) and also I can send tabs from my phone to my computer (which is a better place to read articles anyways).