What's new in Firefox Nightly for Developers 1.0.1

Thank you for trying out Firefox Preview, an experimental browser for Android. We’re already preparing updates, fixes, and new features that we’ll release throughout the year. We hope you'll let us know what you do and don't like, and how we can make this a browser you'll use every day.

You may encounter some issues with this release of Firefox Preview. Share feedback via email firefox-preview-feedback@mozilla.com or file a bug on GitHub: bit.ly/2GCr8Ai

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A more recent upload may be available below!

About Firefox Nightly for Developers 1.0.1

Firefox Nightly for Developers 1.0.1 screenshots (4)

Screenshots from version 154.0a1

Download Firefox Nightly for Developers 1.0.1

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
1.0.1 APK
11891917
July 12, 2019
armeabi-v7a
Android 5.0+
nodpi
1.0.1 APK
11891918
July 12, 2019
arm64-v8a
Android 5.0+
nodpi
1.0.1 APK
11891919
July 12, 2019
x86
Android 5.0+
nodpi
1.0.1 APK
11891920
July 12, 2019
x86_64
Android 5.0+
nodpi
All Releases

Version:154.0a1

Uploaded:June 18, 2026 at 1:33AM UTC

File size:66.41 MB

Downloads:115

Version:153.0a1

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

File size:65.26 MB

Downloads:1,383

Version:152.0a1

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

File size:62.75 MB

Downloads:1,312

Version:151.0a1

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

File size:59.06 MB

Downloads:1,582

Version:150.0a1

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

File size:58.14 MB

Downloads:1,336

Firefox Nightly for Developers 149.0a1

Version:149.0a1

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

File size:57.05 MB

Downloads:2,400

Firefox Nightly for Developers 148.0a1

Version:148.0a1

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

File size:56.34 MB

Downloads:1,424

Firefox Nightly for Developers 147.0a1

Version:147.0a1

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

File size:55.60 MB

Downloads:1,804

Firefox Nightly for Developers 146.0a1

Version:146.0a1

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

File size:58.28 MB

Downloads:2,210

Firefox Nightly for Developers 145.0a1

Version:145.0a1

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

File size:58.17 MB

Downloads:1,310

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