What's new in Firefox Nightly for Developers 1.3.0

Thank you for testing Firefox Preview. Now you can send a tab or a Collection of tabs from > your phone to your other Firefox connected devices! This update also includes enhancements to private browsing and dark mode, along with usability and stability bug fixes.

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About Firefox Nightly for Developers 1.3.0

Firefox Nightly for Developers 1.3.0 screenshots (4)

Screenshots from version 151.0a1

Download Firefox Nightly for Developers 1.3.0

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
1.3.0 APK
12321502
August 21, 2019
armeabi-v7a
Android 5.0+
nodpi
1.3.0 APK
12321503
August 21, 2019
arm64-v8a
Android 5.0+
nodpi
1.3.0 APK
12321504
August 21, 2019
x86
Android 5.0+
nodpi
1.3.0 APK
12321505
August 21, 2019
x86_64
Android 5.0+
nodpi
All Releases

Version:151.0a1

Uploaded:April 11, 2026 at 1:44PM UTC

File size:59.06 MB

Downloads:888

Version:150.0a1

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

File size:58.14 MB

Downloads:1,308

Firefox Nightly for Developers 149.0a1

Version:149.0a1

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

File size:57.05 MB

Downloads:2,296

Firefox Nightly for Developers 148.0a1

Version:148.0a1

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

File size:56.34 MB

Downloads:1,402

Firefox Nightly for Developers 147.0a1

Version:147.0a1

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

File size:55.60 MB

Downloads:1,781

Firefox Nightly for Developers 146.0a1

Version:146.0a1

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

File size:58.28 MB

Downloads:2,201

Firefox Nightly for Developers 145.0a1

Version:145.0a1

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

File size:58.17 MB

Downloads:1,270

Firefox Nightly for Developers 144.0a1

Version:144.0a1

Uploaded:September 14, 2025 at 5:33PM UTC

File size:56.07 MB

Downloads:1,325

Version:143.0a1

Uploaded:August 18, 2025 at 9:16PM UTC

File size:55.76 MB

Downloads:1,182

Version:142.0a1

Uploaded:July 22, 2025 at 3:31AM UTC

File size:54.73 MB

Downloads:1,137

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