What's new in Firefox Beta for Testers 86.0.0-beta.4

Thank you for testing Firefox Beta! We are excited to introduce a major upgrade and a brand new design, and as always we count on your feedback.

Key highlights:
-Bottom nav bar for easier access with option to customize
-Dark & light themes
-Collections to organize your tabs
-Improved support for Progressive Web Apps

More details at support.mozilla.org/kb/firefox-preview-upgrade-faqs

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

About Firefox Beta for Testers 86.0.0-beta.4

Firefox Beta for Testers 86.0.0-beta.4 screenshots (7)

Screenshots from version 146.0b9

Download Firefox Beta for Testers 86.0.0-beta.4

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
86.0.0-beta.4 APK
2015792681
February 11, 2021
armeabi-v7a
Android 5.0+
nodpi
86.0.0-beta.4 APK
2015792683
February 11, 2021
arm64-v8a
Android 5.0+
nodpi
86.0.0-beta.4 APK
2015792685
February 11, 2021
x86
Android 5.0+
nodpi
86.0.0-beta.4 APK
2015792687
February 11, 2021
x86_64
Android 5.0+
nodpi
All Releases
Firefox Beta for Testers 146.0b9

Version:146.0b9

Uploaded:November 28, 2025 at 4:17PM UTC

File size:54.5 MB

Downloads:24

Firefox Beta for Testers 146.0b8

Version:146.0b8

Uploaded:November 26, 2025 at 2:46PM UTC

File size:54.5 MB

Downloads:26

Firefox Beta for Testers 146.0b7

Version:146.0b7

Uploaded:November 24, 2025 at 4:11PM UTC

File size:54.5 MB

Downloads:30

Firefox Beta for Testers 146.0b6

Version:146.0b6

Uploaded:November 21, 2025 at 4:08PM UTC

File size:54.49 MB

Downloads:41

Firefox Beta for Testers 146.0b5

Version:146.0b5

Uploaded:November 19, 2025 at 3:25PM UTC

File size:54.46 MB

Downloads:19

Firefox Beta for Testers 146.0b4

Version:146.0b4

Uploaded:November 17, 2025 at 6:39PM UTC

File size:54.4 MB

Downloads:26

Firefox Beta for Testers 146.0b3

Version:146.0b3

Uploaded:November 14, 2025 at 3:55PM UTC

File size:54.46 MB

Downloads:54

Firefox Beta for Testers 146.0b2

Version:146.0b2

Uploaded:November 13, 2025 at 11:21PM UTC

File size:54.45 MB

Downloads:11

Firefox Beta for Testers 146.0b1

Version:146.0b1

Uploaded:November 12, 2025 at 5:09PM UTC

File size:54.45 MB

Downloads:31

Firefox Beta for Testers 145.0b9

Version:145.0b9

Uploaded:October 31, 2025 at 3:27PM UTC

File size:57.09 MB

Downloads:89

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