goto your google play-store, search for Firefox and then download. I would recommend picking out Firefox Beta as FF in general on mobile has been pretty shite, but the past 2 weeks it was been promising (and one of the only browsers to feature addons! FIrefox: Dev Edition is basically Beta with more bleeding edge features. Firefox Standard: has been pretty brutal for the past year and longer, as in unusable as a daily driver, but that has changed with the recent progression and better Beta verions being passed down to it. Firefox Focus: Yet another one, this one is built to be light on features and on resources. This one is aimed at private browsing and is sadly (depends on how to look at it) based off the Chromium Engine instead of Mozilla's own Gecko Engine. Still a good option.... And my personal champion Mobile for the past ~7 years has been Opera, extremely hard to beat the mix of everything close to perfection, and most importantly the ability to resize long ass scrolling text into a much more readable fashion. This was the deal breaker here for me and always wondered why no one else attempted it or if they did it was shoddy at best. Either way innovation has stopped since the sale to the Chinese, which will let this one rot it's way to the ground....