No. Firefox was too big for my old phone and I switched to palemoon when firefox stopped allowing unsigned plugins on my desktop. I've been using habit browser on my phone. I don't really trust it at all so I give it minimal permissions and try not to do any browsing on my phone I don't expect to be tracked or monitored. It's fast and customizable and has a built in adblocker so I've been fairly happy with it. I've tried a lot of different mobile browsers. I haven't really found any I liked. They all kinda suck in one way or another. I was really hoping something from F-Droid would be appealing to use but they were all disappointing. The state of mobile browsers in general is kind of abysmal.