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Download Firefox Nightly for Developers 155.0a1 APK
Version: 155.0a1 (2016175903)
Languages: 130
Package: org.mozilla.fenix
Downloads: 10
Target: Android 17 (API 37)
480, 640dpi
What's new in Firefox Nightly for Developers 155.0a1
From version 5.2.0:
* Sort Logins
* Streamline Bookmarks/History access
* Improved QR code scanning
* Stability and bugfixes
About Firefox Nightly for Developers 155.0a1
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/
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 www.mozilla.org.
LEARN MORE
- Terms of Use: www.mozilla.org/about/legal/terms/firefox/
- Privacy Notice: www.mozilla.org/privacy/firefox
- Latest news: blog.mozilla.org
Take a browse on the wild side. Be among the first to explore future releases.
Firefox Nightly for Developers 155.0a1 variants
This release comes in several variants (we currently have 27). Consult our handy FAQ to see which download is right for you.
Firefox Nightly for Developers 161.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 25, 2026Version:161.0a1(2016192319) for Android 10+ (Q, API 29)
Uploaded:October 25, 2026 at 1:22AM UTC
File size:117.73 MB
Downloads:0
Firefox Nightly for Developers 161.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 24, 2026Version:161.0a1(2016192127) for Android 10+ (Q, API 29)
Uploaded:October 24, 2026 at 2:05AM UTC
File size:117.77 MB
Downloads:4
Firefox Nightly for Developers 161.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 23, 2026Version:161.0a1(2016192031) for Android 10+ (Q, API 29)
Uploaded:October 23, 2026 at 1:16PM UTC
File size:117.45 MB
Downloads:8
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 21, 2026Version:160.0a1(2016191735) for Android 10+ (Q, API 29)
Uploaded:October 21, 2026 at 11:52PM UTC
File size:117.28 MB
Downloads:9
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 21, 2026Version:160.0a1(2016191647) for Android 10+ (Q, API 29)
Uploaded:October 21, 2026 at 2:39PM UTC
File size:117.20 MB
Downloads:8
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 16, 2026Version:160.0a1(2016190687) for Android 10+ (Q, API 29)
Uploaded:October 16, 2026 at 2:37PM UTC
File size:117.19 MB
Downloads:13
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 15, 2026Version:160.0a1(2016190503) for Android 10+ (Q, API 29)
Uploaded:October 15, 2026 at 1:56PM UTC
File size:118.06 MB
Downloads:13
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 11, 2026Version:160.0a1(2016189711) for Android 10+ (Q, API 29)
Uploaded:October 11, 2026 at 1:39PM UTC
File size:116.22 MB
Downloads:16
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 1 S
October 11, 2026Version:160.0a1(2016189615) for Android 10+ (Q, API 29)
Uploaded:October 11, 2026 at 1:30AM UTC
File size:116.23 MB
Downloads:13
Firefox Nightly for Developers 160.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
October 10, 2026Version:160.0a1(2016189527) for Android 10+ (Q, API 29)
Uploaded:October 10, 2026 at 12:40PM UTC
File size:116.19 MB
Downloads:136
Version:161.0a1
Uploaded:October 25, 2026 at 1:22AM UTC
File size:68.34 MB
Downloads:145
Version:160.0a1
Uploaded:October 23, 2026 at 2:27AM UTC
File size:47.72 MB
Downloads:678
Version:159.0a1
Uploaded:October 9, 2026 at 7:05PM UTC
File size:67.85 MB
Downloads:425
Version:158.0a1
Uploaded:September 24, 2026 at 2:11PM UTC
File size:67.07 MB
Downloads:453
Version:157.0a1
Uploaded:September 10, 2026 at 4:40AM UTC
File size:48.14 MB
Downloads:454
Version:156.0a1
Uploaded:August 28, 2026 at 7:42PM UTC
File size:47.84 MB
Downloads:401
Version:155.0a1
Uploaded:August 13, 2026 at 1:25PM UTC
File size:48.15 MB
Downloads:910
Version:154.0a1
Uploaded:July 20, 2026 at 5:02PM UTC
File size:66.41 MB
Downloads:1,566
Version:153.0a1
Uploaded:June 15, 2026 at 2:12PM UTC
File size:65.26 MB
Downloads:1,512
Version:152.0a1
Uploaded:May 18, 2026 at 2:18PM UTC
File size:62.75 MB
Downloads:1,378
