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Firefox Nightly Description
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/
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 https://www.mozilla.org.
LEARN MORE
- Terms of Use: https://www.mozilla.org/about/legal/terms/firefox/
- Privacy Notice: https://www.mozilla.org/privacy/firefox
- Latest news: https://blog.mozilla.org
Take a browse on the wild side. Be among the first to explore future releases.
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/
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 https://www.mozilla.org.
LEARN MORE
- Terms of Use: https://www.mozilla.org/about/legal/terms/firefox/
- Privacy Notice: https://www.mozilla.org/privacy/firefox
- Latest news: https://blog.mozilla.org
Take a browse on the wild side. Be among the first to explore future releases.
Additional Information
Category
App › Productivity
Version
155.0a1
Updated
Aug 10, 2026
Requires Android
Android: 8.0+ Oreo (API 26)
Permissions
Architectures
Supports 64-bit ARM Android CPU architectures.
arm64-v8a
64-bit
Most modern phones & tablets
Your device
Target Android
Estimated Download Time
File Size: 245.40 MB
3G network (~2 Mbps)
19m 38s
4G LTE (~25 Mbps)
1m 35s
5G network (~150 Mbps)
16 seconds
Broadband / Wi-Fi (~100 Mbps)
24 seconds
Hashes
SHA-1
48c55d00ff8218938541e691976adb9c3b96f458SHA-256
2E95F1FFE2B2B062F0B1E91C8CE4F76AD0E109D5A4E128684B6E6CB7C2941210Signing Certificate SHA-1
0cb59840e844e40056ba8f233df1c764a7db4568Available On
