Firefox Nightly is a developmental channel for new Mozilla Firefox releases.

Please note that Firefox Aurora is no longer available and has transitioned to Firefox Nightly. More details here:

Download the release version of Firefox here:

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

Firefox Nightly automatically sends feedback to Mozilla:

Want to know more about the permissions Firefox requests?

See our list of supported devices and latest minimum system requirements at

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:

All versions

Version:Nightly 200706 06:01

Uploaded:July 6, 2020 at 8:08AM UTC

File size:78.85 MB


Version:Nightly 200705 06:01

Uploaded:July 5, 2020 at 7:17AM UTC

File size:78.85 MB


Version:Nightly 200704 06:01

Uploaded:July 4, 2020 at 8:10AM UTC

File size:78.85 MB


Version:Nightly 200703 06:16

Uploaded:July 3, 2020 at 7:50AM UTC

File size:78.86 MB


Version:Nightly 200702 06:03

Uploaded:July 2, 2020 at 9:02AM UTC

File size:78.71 MB


Version:Nightly 200701 06:01

Uploaded:July 1, 2020 at 8:34AM UTC

File size:78.71 MB


Version:Nightly 200630 06:01

Uploaded:June 30, 2020 at 8:00AM UTC

File size:78.68 MB


Version:Nightly 200629 06:01

Uploaded:June 29, 2020 at 9:14AM UTC

File size:78.68 MB


Version:Nightly 200628 06:01

Uploaded:June 28, 2020 at 8:46AM UTC

File size:78.67 MB


Version:Nightly 200627 06:01

Uploaded:June 27, 2020 at 8:34AM UTC

File size:78.67 MB