Firefox Nightly for Developers

Mozilla

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: https://www.mozilla.org/en-US/privacy/firefox/#pre-release

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: https://bugzilla.mozilla.org/enter_bug.cgi?product=Fenix

Want to know more about the permissions Firefox requests?: https://mzl.la/Permissions

See our list of supported devices and latest minimum system requirements at: https://www.mozilla.org/firefox/mobile/platforms/

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: https://www.mozilla.org/privacy/firefox/

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Ratings and reviews

I love this app in spite of some of the experimental changes. The controls on the bottom separate from search placement grew on me. Either way is fine with me. I think there may be an issue with the way Firefox interacts with the phone's native "back" ◀ functionality. It's skipping a step. I noticed on YouTube's search.

I waited years for a decent mobile version of Firefox. The latest version FINALLY has a tab bar on tablets! Nightly lets you customize with about:config and secret settings. For everyone complaining about the UI & menu design, it's easy to change. Tap about Firefox 5 times, the secret settings menu appears. You can change the nav bar & opt in or out for the redesigned menu. I'm giving 4 stars because the homepage button is annoying and doesn't open in a new proper tab. Going in right direction!

The new UI from July 2024 is significantly worse than previous. They've added a second bar in addition to the address bar, seemingly just so the Share button can now be more prominent. This second bar ignores your settings and is permanently at the bottom of the screen. It cannot be moved or removed. Overall it makes the UI significantly more awkward and intrusive than the previous layout.