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/

BILLIONAIRE FREE FOR 20+ YEARS
The Firefox browser was created in 2004 by Mozilla as a faster, more private browser with more customizable features than web browsers like Internet Explorer. Today, we are still not-for-profit, still not owned by any billionaires and still working to make the internet — and the time you spend on it — better. To learn more about Mozilla, please go to https://www.mozilla.org.

LEARN MORE
- Terms of Use: https://www.mozilla.org/about/legal/terms/firefox/
- Privacy Notice: https://www.mozilla.org/privacy/firefox
- Latest news: https://blog.mozilla.org

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Ratings and reviews

I'm not entirely sure what happened with the design of the browser since the last update I had installed, but moving all the settings to a full-screen pop-up was not the right move. I used the quick-access navigation buttons often, and the small desktop-like pop-up for settings and extensions and the like from the corner were great. This feels like Mozilla are regressing in design. I chose Firefox because it's simple, customizable, and respects me as a consumer. I now question that choice.

It's a good app and I appreciate being able to use extensions on it. I've been having an issue lately where the app crashes (like, completely closes) whenever I hit the back button on my phone. The in-browser back button works, but I've never had to use it before and it's incredibly annoying to have to restart the app every time I accidentally hit the back button I've always used.

Keeps telling me to sign in but won't let me! This used to be great, very fast, has extensions. I waited years for a decent mobile version of Firefox but I've had it. The new menu is AWFUL. Takes up the entire screen & can't customize. I had to sideload old version on my tablet because the UI was so bad. At least has a tab bar on tablets now. But can't arrange shortcuts & now can't sign in. Mozilla you're driving your last users away! It's unfortunate because desktop is great.