Firefox Browser (Nightly for Developers)

40.1K reviews
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About this app

Warning: Nightly is an unstable testing and development platform. By default, Firefox Nightly automatically sends data to Mozilla — and sometimes our partners — to help us handle problems and try ideas. Learn what is shared:

Firefox Nightly gets updated every day and is designed to showcase the more experimental builds of Firefox. The Nightly channel allows users to experience the newest Firefox innovations in an unstable environment and provide feedback on features and performance to help determine what makes the final release.

Found a bug? Report it at:

Want to know more about the permissions Firefox requests?:

See our list of supported devices and latest minimum system requirements at:

Mozilla marketing: In order to understand the performance of certain Mozilla marketing campaigns, Firefox sends data, including a Google advertising ID, IP address, timestamp, country, language/locale, operating system, app version, to our third party vendor. Learn more by reading our Privacy Notice here:

Take a browse on the wild side. Be among the first to explore future releases.
Updated on
May 19, 2022

Data safety

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Ratings and reviews

40.1K reviews
Julien Salinas
September 12, 2019
I'm so glad that Firefox is releasing a great mobile browser at last! This one is amazingly fast, it starts up very quickly and page load time is impressive. Personally I think it's faster than Chrome and Opera. Ergonomy is nice and straight to the point. Everything is at the bottom (URL, settings, tabs...) which is great as my finger is too small to reach the top of the screen. Ads/trackers are blocked. My only criticism is that I'd love to see which ads/trackers have been blocked in detail.
65 people found this review helpful
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Eduardo Oliveira
July 3, 2020
Amazing! Address bar at the bottom is something strange but that makes a lot of sense: do not need to move the finger to the top of the screen to type. Nice menu and all the features I like! -- Edit since last update in June 2020 The new tab opening process is worse than the previous one! -- Edit since last update July 2020 Crashing and can't be open!
41 people found this review helpful
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tom bonnot
August 27, 2019
It's pretty good, easy to use, really good design etc... But it miss some things : - Adding a new search engine - As basic FireFox, adding some widget, like adblockers (maybe it's not good for privacy, so it's wise choice to not put them, I don't know, tell if it is) - We don't have acces to a lot of parameters, it miss a lot of things I know it's a preview. I prefer saying this to help you, instead of just yelling and quitting, I will use it (even if I prefer Focus) Great jobs :p! Continue
2 people found this review helpful
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