I use Firefox on my laptop but make sure that I do not use the latest and greatest, for contrary to Mozilla's 'writing on the tin' you are only another one of their Beta testers (as this story proves). I tried Firefox for Android. I used it for a month and tried to like, really I did. It has some neat features, like plugin support for example.
Too bad that you NEED that plugin support, because the UI is a miserable, utter failure. No scroll to top. NO TEXT REFLOW (on a portable device. Really??!). Search from the URL bar...which means that once your search has been inputted and receives a reply from the engine you can't go back to change your search query as your input is gone and replace with the reply URL. Crashes on a whim, sucks batteries dry like Whitney Houston at a free coke party (ouch!). Can't handle text reply boxes on a variety of websites, one of which being one of the top 1500 websites on the planet.
Both the scroll to top and text reflow can be fixed with plugins, but the text reflow plugin is beta and certainly does not work properly, sometimes not worth a damn on some websites. The cookie whitelist and Bluhell firewall are nice, but both eat up CPU cycles and severely impact performance.
In other words, Firefox for Android is a disaster and not ONLY does Mozilla wish to deny this truth I also caught them deleting poor or 'negative' reviews in Google Play, masking their failure and padding their satisfaction score (I wrote FIVE poor reviews, with details what was wrong, with NO bad language, and not a ONE made it past review). So, I complained to Google, seemed to improve, now some negative reviews do actually show up.