Premium
What's new in Firefox Nightly for Developers Nightly 201009 17:03
From version 5.2.0:
* Sort Logins
* Streamline Bookmarks/History access
* Improved QR code scanning
* Stability and bugfixes
About Firefox Nightly for Developers Nightly 201009 17:03
Please note that this app used to be titled Firefox Preview. It has now been transitioned to Firefox Nightly.
Premium
Firefox Nightly is a developmental channel for new Mozilla Firefox releases.
Firefox Nightly 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: github.com/mozilla-mobile/fenix/issues
Firefox Nightly automatically sends feedback to Mozilla: www.mozilla.org/privacy/firefox/#telemetry
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/
Firefox Nightly for Developers Nightly 201009 17:03 screenshots (4)
Screenshots from version 149.0a1
Download Firefox Nightly for Developers Nightly 201009 17:03
This release comes in several variants (we currently have 4). Consult our handy FAQ to see which download is right for you.
Version:149.0a1
Uploaded:February 3, 2026 at 1:26AM UTC
File size:57.05 MB
Downloads:874
Version:148.0a1
Uploaded:January 12, 2026 at 2:44PM UTC
File size:56.34 MB
Downloads:1,364
Version:147.0a1
Uploaded:December 8, 2025 at 1:51PM UTC
File size:55.6 MB
Downloads:1,756
Version:146.0a1
Uploaded:November 10, 2025 at 2:18PM UTC
File size:58.28 MB
Downloads:2,188
Version:145.0a1
Uploaded:October 13, 2025 at 8:09AM UTC
File size:58.17 MB
Downloads:1,236
Version:144.0a1
Uploaded:September 14, 2025 at 5:33PM UTC
File size:56.07 MB
Downloads:1,176
Version:143.0a1
Uploaded:August 18, 2025 at 9:16PM UTC
File size:55.76 MB
Downloads:1,119
Version:142.0a1
Uploaded:July 22, 2025 at 3:31AM UTC
File size:54.73 MB
Downloads:1,089
Version:141.0a1
Uploaded:June 23, 2025 at 5:45PM UTC
File size:54.02 MB
Downloads:905
Version:140.0a1
Uploaded:May 27, 2025 at 10:48PM UTC
File size:53.5 MB
Downloads:1,120
Follow APK Mirror
