Premium
What's new in Firefox Nightly for Developers 138.0a1
From version 5.2.0:
* Sort Logins
* Streamline Bookmarks/History access
* Improved QR code scanning
* Stability and bugfixes
About Firefox Nightly for Developers 138.0a1
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: www.mozilla.org/en-US/privacy/firefox/#pre-release
Premium
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: bugzilla.mozilla.org/enter_bug.cgi?product=Fenix
Want to know more about the permissions Firefox requests?: mzl.la/Permissions
See our list of supported devices and latest minimum system requirements at: 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: www.mozilla.org/privacy/firefox/
Take a browse on the wild side. Be among the first to explore future releases.
Download Firefox Nightly for Developers 138.0a1
This release comes in several variants (we currently have 18). Consult our handy FAQ to see which download is right for you.
Version:139.0a1
Uploaded:April 28, 2025 at 4:58AM UTC
File size:52.36 MB
Downloads:1,297
Version:138.0a1
Uploaded:April 1, 2025 at 4:08PM UTC
File size:51.65 MB
Downloads:1,171
Version:137.0a1
Uploaded:March 3, 2025 at 3:19PM UTC
File size:51.04 MB
Downloads:954
Version:136.0a1
Uploaded:February 4, 2025 at 6:57AM UTC
File size:51.58 MB
Downloads:930
Version:135.0a1
Uploaded:January 6, 2025 at 7:11AM UTC
File size:50.43 MB
Downloads:1,339
Version:134.0a1
Uploaded:November 26, 2024 at 9:25AM UTC
File size:49.88 MB
Downloads:1,528
Version:133.0a1
Uploaded:October 28, 2024 at 5:59PM UTC
File size:49.38 MB
Downloads:1,182
Version:132.0a1
Uploaded:September 30, 2024 at 4:26AM UTC
File size:48.59 MB
Downloads:978
Version:131.0a1
Uploaded:September 3, 2024 at 7:09AM UTC
File size:100.98 MB
Downloads:1,842
Version:130.0a1
Uploaded:August 6, 2024 at 3:20PM UTC
File size:303.68 MB
Downloads:1,773
