About Firefox Nightly
Firefox Nightly is a developmental channel for new Mozilla Firefox releases.
Please note that Firefox Preview has transitioned to Firefox Nightly.
Download the release version of Firefox.
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.
Firefox Nightly automatically sends feedback to Mozilla: https://www.mozilla.org/privacy/firefox/#telemetry
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/
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:
https://www.mozilla.org/privacy/firefox/
Download Firefox Nightly
This release comes in several variants (we currently have 4). Consult our handy FAQ to see which download is right for you.
Version:127.0a1
Uploaded:April 16, 2024 at 2:46AM UTC
File size:290.06 MB
Downloads:76
Version:126.0a1
Uploaded:April 15, 2024 at 3:07AM UTC
File size:289.27 MB
Downloads:846
Version:126.0a1-20240322093041
Uploaded:March 23, 2024 at 8:58AM UTC
File size:288.91 MB
Downloads:100
Version:126.0a1-20240320095303
Uploaded:March 21, 2024 at 5:45PM UTC
File size:288.88 MB
Downloads:77
Version:125.0a1
Uploaded:March 18, 2024 at 6:39AM UTC
File size:33.12 MB
Downloads:1,920
Version:124.0a1
Uploaded:February 18, 2024 at 7:18AM UTC
File size:32.87 MB
Downloads:1,522
Version:123.0a1
Uploaded:January 22, 2024 at 6:23PM UTC
File size:32.23 MB
Downloads:2,055
Version:122.0a1
Uploaded:December 18, 2023 at 6:47AM UTC
File size:32.11 MB
Downloads:1,536
Version:121.0a1
Uploaded:November 20, 2023 at 6:06AM UTC
File size:89.22 MB
Downloads:1,880
Version:120.0a1
Uploaded:October 23, 2023 at 5:40AM UTC
File size:87.29 MB
Downloads:2,390