What's new in Firefox Beta for Testers 138.0b8

From version 87.0.0-beta.2:

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 138.0b8

Download Firefox Beta for Testers 138.0b8

This release may come in several variants. Consult our handy FAQ to see which download is right for you.

Variant
Arch
Version
DPI
138.0b8 BUNDLE 11 S
2016085487
April 17, 2025
universal
Android 5.0+
120-640dpi
All Releases
Firefox Beta for Testers 141.0b5

Version:141.0b5

Uploaded:July 3, 2025 at 3:50PM UTC

File size:53.66 MB

Downloads:2

Firefox Beta for Testers 141.0b4

Version:141.0b4

Uploaded:July 1, 2025 at 3:36PM UTC

File size:53.65 MB

Downloads:28

Firefox Beta for Testers 141.0b3

Version:141.0b3

Uploaded:June 28, 2025 at 10:31AM UTC

File size:53.61 MB

Downloads:40

Firefox Beta for Testers 141.0b2

Version:141.0b2

Uploaded:June 27, 2025 at 9:34AM UTC

File size:53.6 MB

Downloads:11

Firefox Beta for Testers 140.0b10

Version:140.0b10

Uploaded:June 17, 2025 at 5:40PM UTC

File size:53.17 MB

Downloads:94

Firefox Beta for Testers 140.0b9

Version:140.0b9

Uploaded:June 14, 2025 at 6:47PM UTC

File size:53.15 MB

Downloads:45

Firefox Beta for Testers 140.0b8

Version:140.0b8

Uploaded:June 12, 2025 at 3:36PM UTC

File size:53.15 MB

Downloads:23

Firefox Beta for Testers 140.0b7

Version:140.0b7

Uploaded:June 10, 2025 at 3:44PM UTC

File size:53.14 MB

Downloads:31

Firefox Beta for Testers 140.0b6

Version:140.0b6

Uploaded:June 7, 2025 at 3:21PM UTC

File size:53.13 MB

Downloads:45

Firefox Beta for Testers 140.0b5

Version:140.0b5

Uploaded:June 5, 2025 at 3:07PM UTC

File size:53.1 MB

Downloads:16

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