What's new in Firefox Nightly for Developers 3.0.1

Thank you for testing Firefox Preview! This release includes new features, enhancements, and bug fixes:
* Turned on ETP for all users
* Added support for long running downloads with notifications
* Bug fixes and UI updates

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A more recent upload may be available below!

About Firefox Nightly for Developers 3.0.1

Firefox Nightly for Developers 3.0.1 Play Store screenshots (4)

Screenshots from version 159.0a1

Download Firefox Nightly for Developers 3.0.1

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
3.0.1 APK
13502255
December 19, 2019
armeabi-v7a
Android 5.0+
nodpi
3.0.1 APK
13502256
December 19, 2019
arm64-v8a
Android 5.0+
nodpi
3.0.1 APK
13502257
December 19, 2019
x86
Android 5.0+
nodpi
3.0.1 APK
13502258
December 19, 2019
x86_64
Android 5.0+
nodpi
All Releases
Firefox Nightly for Developers 159.0a1

Version:159.0a1

Uploaded:September 29, 2026 at 3:07AM UTC

File size:67.85 MB

Downloads:152

Firefox Nightly for Developers 158.0a1

Version:158.0a1

Uploaded:September 24, 2026 at 2:11PM UTC

File size:67.07 MB

Downloads:418

Firefox Nightly for Developers 157.0a1

Version:157.0a1

Uploaded:September 10, 2026 at 4:40AM UTC

File size:48.14 MB

Downloads:451

Firefox Nightly for Developers 156.0a1

Version:156.0a1

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

File size:47.84 MB

Downloads:395

Firefox Nightly for Developers 155.0a1

Version:155.0a1

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

File size:48.15 MB

Downloads:893

Version:154.0a1

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

File size:66.41 MB

Downloads:1,552

Version:153.0a1

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

File size:65.26 MB

Downloads:1,481

Version:152.0a1

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

File size:62.75 MB

Downloads:1,373

Version:151.0a1

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

File size:59.06 MB

Downloads:1,602

Version:150.0a1

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

File size:58.14 MB

Downloads:1,418

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