> But then there are little things like no ability to pull down a web page on Firefox mobile to refresh.

This works for me with Firefox on Android. Not sure about Firefox Preview but definitely works on the normal FF app.

I've always been a FF user so there's nothing that would make me switch from Chrome. Extension support, speed, etc. are all exactly where I'd want them compared to Chrome, so really I don't feel like one has much of a leg up on the other.