What's new in Firefox Nightly for Developers 5.0.0

Thanks for testing Firefox Preview! In the 5.0 release there are:

5 new addons
PWA #204
Picture-in-Picture #2818
Media improvements #9703
Support for fullscreen with notches/cutouts #4149
Polish, performance, crash, and bug fixes

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

About Firefox Nightly for Developers 5.0.0

Firefox Nightly for Developers 5.0.0 Play Store screenshots (4)

Screenshots from version 162.0a1

Download Firefox Nightly for Developers 5.0.0

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
5.0.0 APK
21212136
May 8, 2020
armeabi-v7a
Android 5.0+
nodpi
5.0.0 APK
21212137
May 1, 2020
arm64-v8a
Android 5.0+
nodpi
5.0.0 APK
21212138
May 8, 2020
x86
Android 5.0+
nodpi
5.0.0 APK
21212139
May 8, 2020
x86_64
Android 5.0+
nodpi
All Releases

Version:162.0a1

Uploaded:November 9, 2026 at 12:23PM UTC

File size:49.65 MB

Downloads:190

Firefox Nightly for Developers 161.0a1

Version:161.0a1

Uploaded:November 6, 2026 at 11:50PM UTC

File size:68.34 MB

Downloads:1,140

Firefox Nightly for Developers 160.0a1

Version:160.0a1

Uploaded:October 23, 2026 at 2:27AM UTC

File size:47.72 MB

Downloads:724

Firefox Nightly for Developers 159.0a1

Version:159.0a1

Uploaded:October 9, 2026 at 7:05PM UTC

File size:67.85 MB

Downloads:435

Firefox Nightly for Developers 158.0a1

Version:158.0a1

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

File size:67.07 MB

Downloads:480

Firefox Nightly for Developers 157.0a1

Version:157.0a1

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

File size:48.14 MB

Downloads:456

Firefox Nightly for Developers 156.0a1

Version:156.0a1

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

File size:47.84 MB

Downloads:407

Firefox Nightly for Developers 155.0a1

Version:155.0a1

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

File size:48.15 MB

Downloads:926

Version:154.0a1

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

File size:66.41 MB

Downloads:1,572

Version:153.0a1

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

File size:65.26 MB

Downloads:1,516

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