Firefox Nightly for Developers

48.8K reviews
Content rating
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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 28, 2023

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

Ratings and reviews

45.9K reviews
May 27, 2023
Downloaded over Firefox for Android to use as my default browser because of its access to about:config. However, I toggled off the Reader View button in a:c, as I always do because I hate it, but the button won't get off of my url bar. Requesting this be looked into so that I can comfortably use this as my default browser.
1 person found this review helpful
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Daniel DePeau
May 2, 2023
I'd been stubbornly sticking to v68.11 ever since the redesign, but finally decided to give the latest version another try... it's okay, mostly. The password manager is much better, and I haven't run into any pages that just don't work...though there are some where elements are sized strangely. My only major annoyance at the moment is how frequently it reloads tabs; switching windows and coming back causes it to refresh, rather than just staying loaded.
21 people found this review helpful
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February 6, 2023
Recently Firefox Nightly had a few amazing updates. Aside from supporting a wide range of extensions (even Tampermoneky, so you can use your userscripts from the desktop version), it now is able to open PDFs within the browser (just like Safari on iOS) and it's the first Android browser (that I know about) which can do that. It was the only feature that I used to like in Safari and it was such a bummer that it wasn't available on Android. Thanks Mozilla! Keep it up.
111 people found this review helpful
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