Firefox Nightly for Developers

42.1K 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
Aug 11, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted
42.1K reviews
July 26, 2022
Actually allows extensions on mobile/tablet, which is more than I can say about Google Chrome. This is grand. Thanks for making it. It is impossible for my neurodivergent brain to navigate web sites that have any amount of animated ads or videos playing in a static position, relative to one's screen. This has been a huge help.
25 people found this review helpful
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Nick G
July 25, 2022
Used to be the only usable mobile browser—offering desktop extensions and other desktop-grade features. But it's not even usable anymore. Most of the time, it just doesn't start. If it does start, it will often crash. If it doesn't crash, you might be stuck on a page with the inability to scroll or pull up the navigation bar. I had found some workarounds (like opening/closing multitasking), but even that fails to rectify the bugs now. It's gotten so unstable, it isn't usable anymore
27 people found this review helpful
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carrick water
March 6, 2022
The one browser to rule them all. I've used a lot of browsers on both Android and iOS and honestly Firefox nightly tops them all. Allows you to install any extension in the Firefox store, allows to disable tracking, allows you to stop auto playing videos, allows you to view tabs as grids, man I can go on and on. Thank you Firefox for this wonderful product.
148 people found this review helpful
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