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

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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 154.0a1

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:154.0a1

Uploaded:June 20, 2026 at 2:18PM UTC

File size:66.41 MB

Downloads:216

Version:153.0a1

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

File size:65.26 MB

Downloads:1,435

Version:152.0a1

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

File size:62.75 MB

Downloads:1,313

Version:151.0a1

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

File size:59.06 MB

Downloads:1,584

Version:150.0a1

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

File size:58.14 MB

Downloads:1,359

Firefox Nightly for Developers 149.0a1

Version:149.0a1

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

File size:57.05 MB

Downloads:2,448

Firefox Nightly for Developers 148.0a1

Version:148.0a1

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

File size:56.34 MB

Downloads:1,448

Firefox Nightly for Developers 147.0a1

Version:147.0a1

Uploaded:December 8, 2025 at 1:51PM UTC

File size:55.60 MB

Downloads:1,826

Firefox Nightly for Developers 146.0a1

Version:146.0a1

Uploaded:November 10, 2025 at 2:18PM UTC

File size:58.28 MB

Downloads:2,237

Firefox Nightly for Developers 145.0a1

Version:145.0a1

Uploaded:October 13, 2025 at 8:09AM UTC

File size:58.17 MB

Downloads:1,320

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