Firefox Nightly for Developers150.0a
Publisher Description
Nightly is built for testers. Help us make Firefox the best browser it can be.
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/
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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.
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- Terms of Use: https://www.mozilla.org/about/legal/terms/firefox/
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- Latest news: https://blog.mozilla.org
Take a browse on the wild side. Be among the first to explore future releases.
About Firefox Nightly for Developers
The company that develops Firefox Nightly for Developers is Mozilla. The latest version released by its developer is 150.0a.
To install Firefox Nightly for Developers on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-03-08 and was downloaded 8 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Firefox Nightly for Developers as malware as malware if the download link to org.mozilla.fenix is broken.
How to install Firefox Nightly for Developers on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the Firefox Nightly for Developers is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by Firefox Nightly for Developers will be shown. Click on Accept to continue the process.
- Firefox Nightly for Developers will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
Program Details
System requirements
Download information
Pricing
Version History
version 150.0a1
posted on 2026-03-08
version 5.2.0
posted on 2020-06-23
Thanks for trying out Firefox Preview 5.2.0! This release includes:
* Redesigned New Tabs Tray
* Support for voice input for search
* Various accessibility improvements
* Added support for opening pages in Reader Mode from the urlbar
* Improvements to the dynamic bottom toolbar
* Added quick contextual menu to tab switcher
* Added pull-to-refresh gesture to sync history
* Various bug and crash fixes
version 5.1.1
posted on 2020-06-18
* Sort Logins
* Streamline Bookmarks/History access
*
Improved QR code scanning
* Stability and bugfixes
version 5.0.0
posted on 2020-06-01
Thanks for trying out Firefox Preview 5.0.0! This release includes:
* Added support for
5 new addons
* Added PWA support
* Picture-in-Picture mode now available for video playback
* Other media playback improvements
* Support for fullscreen on devices with notches/cutouts
* Various polish, performance, crash, and bug fixes
version 4.3.0
posted on 2020-05-04
Thanks for trying out Firefox Preview 4.3.0! This release includes:
- In-App Language Selector
- Android 8 RTL-LTR fix
- Homescreen improvements
- Disable Private Mode screenshots option
- PWA fixes
- Improved animations
- Fullscreen fixes
- Advanced Block Autoplay settings
- Polish, bug, and crash fixes
version 4.2.1
posted on 2020-04-17
Thanks for trying out Firefox Preview 4.2.1! This release includes a critical security fix.
version 4.2.0
posted on 2020-03-30
Thanks for trying out Firefox Preview 4.2.0! This release includes:
- Searchable logins
- Accessibility improvements
- Toolbar enhancements
- Polish, crashfixes, bugfixes
version 4.1.0
posted on 2020-03-26
Browser transition animations
Toolbar and menu fixes
Backpress behavior fixes
Notifications of new addons
More Logins features
Fixes changing Sync checkboxes
Stability and crash fixes
version 4.0.0
posted on 2020-03-17
Thank you for testing Firefox Preview! This release includes the following changes:
* Login management
* In-App Language Chooser
* Support for Top Sites
* Bypassing Certificate errors
* Fix persistent "Undo closed tab" notification
* Initial extension support featuring uBlock Origin
And many other bug fixes and improvements.
version 3.2.0
posted on 2020-01-31
Thank you for testing Firefox Preview! This release includes improvements to search and download, as well as stability and performance bug fixes.