What's new in Firefox Nightly for Developers 3.2.1

Login management
In-App Language Chooser
Top Sites
Bypassing Certificate errors
Fix persistent undo notification
Initial extension support featuring uBlock Origin
And other bugfixes and improvements

Scroll to available downloads
A more recent upload may be available below!

About Firefox Nightly for Developers 3.2.1

Firefox Nightly for Developers 3.2.1 screenshots (4)

Screenshots from version 157.0a1

Download Firefox Nightly for Developers 3.2.1

This release comes in several variants (we currently have 4). Consult our handy FAQ to see which download is right for you.

Variant
Arch
Version
DPI
3.2.1 APK
20250349
February 3, 2020
armeabi-v7a
Android 5.0+
nodpi
3.2.1 APK
20250350
February 3, 2020
arm64-v8a
Android 5.0+
nodpi
3.2.1 APK
20250351
February 3, 2020
x86
Android 5.0+
nodpi
3.2.1 APK
20250352
February 3, 2020
x86_64
Android 5.0+
nodpi
All Releases

Version:157.0a1

Uploaded:August 31, 2026 at 12:39PM UTC

File size:48.14 MB

Downloads:180

Firefox Nightly for Developers 156.0a1

Version:156.0a1

Uploaded:August 28, 2026 at 7:42PM UTC

File size:47.84 MB

Downloads:364

Firefox Nightly for Developers 155.0a1

Version:155.0a1

Uploaded:August 13, 2026 at 1:25PM UTC

File size:48.15 MB

Downloads:840

Version:154.0a1

Uploaded:July 20, 2026 at 5:02PM UTC

File size:66.41 MB

Downloads:1,542

Version:153.0a1

Uploaded:June 15, 2026 at 2:12PM UTC

File size:65.26 MB

Downloads:1,476

Version:152.0a1

Uploaded:May 18, 2026 at 2:18PM UTC

File size:62.75 MB

Downloads:1,339

Version:151.0a1

Uploaded:April 20, 2026 at 1:22PM UTC

File size:59.06 MB

Downloads:1,599

Version:150.0a1

Uploaded:March 23, 2026 at 11:36AM UTC

File size:58.14 MB

Downloads:1,375

Firefox Nightly for Developers 149.0a1

Version:149.0a1

Uploaded:February 23, 2026 at 1:04PM UTC

File size:57.05 MB

Downloads:2,485

Firefox Nightly for Developers 148.0a1

Version:148.0a1

Uploaded:January 12, 2026 at 2:44PM UTC

File size:56.34 MB

Downloads:1,486

Comments