Premium
About Firefox Nightly for Developers 1.0.1920
Welcome to a sneak peek of our new mobile browser.
We know a little something about making game-changing web browsers. That’s why we’re excited to give you early access to Firefox Preview, a sneak peek of our new mobile browser. Built on GeckoView, this is our fastest Android browser yet. We’ve turned up the volume on everything you expect from Firefox: ease of use, safety, choice, control and privacy.
Download Firefox Nightly for Developers 1.0.1920
This release comes in several variants (we currently have 3). Consult our handy FAQ to see which download is right for you.
Version:139.0a1
Uploaded:April 18, 2025 at 5:12AM UTC
File size:52.36 MB
Downloads:827
Version:138.0a1
Uploaded:April 1, 2025 at 4:08PM UTC
File size:51.65 MB
Downloads:1,161
Version:137.0a1
Uploaded:March 3, 2025 at 3:19PM UTC
File size:51.04 MB
Downloads:953
Version:136.0a1
Uploaded:February 4, 2025 at 6:57AM UTC
File size:51.58 MB
Downloads:925
Version:135.0a1
Uploaded:January 6, 2025 at 7:11AM UTC
File size:50.43 MB
Downloads:1,336
Version:134.0a1
Uploaded:November 26, 2024 at 9:25AM UTC
File size:49.88 MB
Downloads:1,527
Version:133.0a1
Uploaded:October 28, 2024 at 5:59PM UTC
File size:49.38 MB
Downloads:1,180
Version:132.0a1
Uploaded:September 30, 2024 at 4:26AM UTC
File size:48.59 MB
Downloads:976
Version:131.0a1
Uploaded:September 3, 2024 at 7:09AM UTC
File size:100.98 MB
Downloads:1,830
Version:130.0a1
Uploaded:August 6, 2024 at 3:20PM UTC
File size:303.68 MB
Downloads:1,759
