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Download Firefox Nightly for Developers 155.0a1 APK
Version: 155.0a1 (2016173895)
Languages: 130
Package: org.mozilla.fenix
Downloads: 9
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 8). Consult our handy FAQ to see which download is right for you.
Firefox Nightly for Developers 155.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 22, 2026Version:155.0a1(2016174079) for Android 10+ (Q, API 29)
Uploaded:July 22, 2026 at 12:40AM UTC
File size:114.94 MB
Downloads:1
Firefox Nightly for Developers 155.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 21, 2026Version:155.0a1(2016173983) for Android 10+ (Q, API 29)
Uploaded:July 21, 2026 at 1:48PM UTC
File size:114.95 MB
Downloads:7
Firefox Nightly for Developers 155.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 21, 2026Version:155.0a1(2016173895) for Android 10+ (Q, API 29)
Uploaded:July 21, 2026 at 1:54AM UTC
File size:115.25 MB
Downloads:9
Firefox Nightly for Developers 155.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 20, 2026Version:155.0a1(2016173863) for Android 10+ (Q, API 29)
Uploaded:July 20, 2026 at 10:25PM UTC
File size:115.24 MB
Downloads:2
Firefox Nightly for Developers 154.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 20, 2026Version:154.0a1(2016173791) for Android 10+ (Q, API 29)
Uploaded:July 20, 2026 at 1:50PM UTC
File size:115.26 MB
Downloads:6
Firefox Nightly for Developers 154.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 2 S
July 20, 2026Version:154.0a1(2016173695) for Android 10+ (Q, API 29)
Uploaded:July 20, 2026 at 12:45AM UTC
File size:115.24 MB
Downloads:6
Firefox Nightly for Developers 154.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 1 S
July 19, 2026Version:154.0a1(2016173599) for Android 10+ (Q, API 29)
Uploaded:July 19, 2026 at 1:28PM UTC
File size:115.20 MB
Downloads:10
Firefox Nightly for Developers 154.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 1 S
July 18, 2026Version:154.0a1(2016173407) for Android 10+ (Q, API 29)
Uploaded:July 18, 2026 at 2:41PM UTC
File size:115.21 MB
Downloads:14
Firefox Nightly for Developers 154.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 17, 2026Version:154.0a1(2016173271) for Android 10+ (Q, API 29)
Uploaded:July 17, 2026 at 11:31PM UTC
File size:115.17 MB
Downloads:6
Firefox Nightly for Developers 154.0a1 (arm64-v8a) (480-640dpi) (Android 10+) BUNDLE 3 S
July 17, 2026Version:154.0a1(2016173215) for Android 10+ (Q, API 29)
Uploaded:July 17, 2026 at 1:21PM UTC
File size:115.18 MB
Downloads:11
Version:155.0a1
Uploaded:July 22, 2026 at 12:40AM UTC
File size:48.15 MB
Downloads:39
Version:154.0a1
Uploaded:July 20, 2026 at 1:50PM UTC
File size:66.41 MB
Downloads:1,601
Version:153.0a1
Uploaded:June 15, 2026 at 2:12PM UTC
File size:65.26 MB
Downloads:1,464
Version:152.0a1
Uploaded:May 18, 2026 at 2:18PM UTC
File size:62.75 MB
Downloads:1,323
Version:151.0a1
Uploaded:April 20, 2026 at 1:22PM UTC
File size:59.06 MB
Downloads:1,598
Version:150.0a1
Uploaded:March 23, 2026 at 11:36AM UTC
File size:58.14 MB
Downloads:1,367
Version:149.0a1
Uploaded:February 23, 2026 at 1:04PM UTC
File size:57.05 MB
Downloads:2,463
Version:148.0a1
Uploaded:January 12, 2026 at 2:44PM UTC
File size:56.34 MB
Downloads:1,477
Version:147.0a1
Uploaded:December 8, 2025 at 1:51PM UTC
File size:55.60 MB
Downloads:1,835
Version:146.0a1
Uploaded:November 10, 2025 at 2:18PM UTC
File size:58.28 MB
Downloads:2,239
