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About Firefox Beta for Testers 51.0
Help refine and polish the newest features almost ready for prime time. With Firefox Beta — Web browser, you get to test the latest performance, customization and security enhancements before they make it to our next version. Have an impact by helping to put the finishing touches on features and functionality.
Find a bug? Report it at mzl.la/android_bugs.
Want to know more about the permissions Firefox requests? mzl.la/Permissions
See our list of supported devices and latest minimum system requirements at www.mozilla.org/en-US/firefox/mobile/platforms/.
Mozilla marketing: In order to understand the performance of certain Mozilla marketing campaigns, Firefox sends data, including a Google advertising ID, IP address, timestamp, country, language/locale, operating system, app version, to our third party vendor. Learn more by reading our Privacy Notice here: www.mozilla.org/en-US/privacy/firefox/
ABOUT MOZILLA
Mozilla is a proudly non-profit organization dedicated to keeping the power of the Web in people's hands. We're a global community of users, contributors and developers working to innovate on your behalf. When you use Firefox, you become a part of that community, helping us build a brighter future for the Web. Learn more at mozilla.org.
Download Firefox Beta for Testers 51.0
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:158.0b1
Uploaded:September 28, 2026 at 6:36PM UTC
File size:68.15 MB
Downloads:18
Version:157.0b5
Uploaded:September 23, 2026 at 4:45PM UTC
File size:66.31 MB
Downloads:60
Version:157.0b4
Uploaded:September 21, 2026 at 7:19PM UTC
File size:48.13 MB
Downloads:36
Version:157.0b3
Uploaded:September 19, 2026 at 2:04AM UTC
File size:66.27 MB
Downloads:67
Version:157.0b2
Uploaded:September 16, 2026 at 6:03PM UTC
File size:48.10 MB
Downloads:24
Version:157.0b1
Uploaded:September 15, 2026 at 5:58AM UTC
File size:66.27 MB
Downloads:42
Version:156.0b5
Uploaded:September 12, 2026 at 4:14PM UTC
File size:64.92 MB
Downloads:62
Version:156.0b4
Uploaded:September 7, 2026 at 10:48PM UTC
File size:47.23 MB
Downloads:45
Version:156.0b3
Uploaded:September 6, 2026 at 5:36PM UTC
File size:64.88 MB
Downloads:44
Version:156.0b2
Uploaded:September 2, 2026 at 2:25PM UTC
File size:47.21 MB
Downloads:45
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