Mozilla Firefox Beta & Nightly Channel Releases

JRViejo · Mar 11, 2025

FYI. Mozilla Firefox, Portable Edition 137.0 Beta 2 (web browser) Released for the PA Platform, courtesy of PortableApps.com

Also: Mozilla Firefox, Portable Edition Nightly 138 (web browser) Released for the PA Platform

JRViejo · Apr 1, 2025

FYI. Firefox Nightly 139.0a1 Released Mar 31, 2025

Release Notes | Nightly Blog | Choose which Firefox Browser to download in your language

Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports.

Warning: Features listed here may or may not make a final release of Firefox.
Click to expand...

JRViejo · Apr 1, 2025

FYI. Firefox 138.0 Beta 1 released Apr 1, 2025.

The Firefox Beta page's Download button downloads Firefox Setup 138.0b1.exe.
Choose which Firefox Browser to download in your language.
Release Notes
System Requirements.

Also, Firefox 138 for Developers

This article provides information about the changes in Firefox 138 that will affect developers. Firefox 138 is the current Beta version of Firefox, and will ship on Apr 29, 2025.
Click to expand...

JRViejo · Apr 5, 2025

FYI. Mozilla Firefox, Portable Edition 138.0 Beta 1 (web browser) Released for the PA Platform, courtesy of PortableApps.com

JRViejo · Apr 7, 2025

FYI. Mozilla Firefox, Portable Edition Nightly 139 (web browser) Released for the PA Platform, courtesy of PortableApps.com

Brummelchen · Apr 25, 2025

mozilla has stopped nightly updates because new builds may result in profile loss under certain circumstances
DO NOT update manually!

i have not found any hint on bugzilla or the build logs
https://hg-edge.mozilla.org/mozilla-central/shortlog

Brummelchen · Apr 26, 2025

mozilla has fixed this issue, ticket for explanation:
https://bugzilla.mozilla.org/show_bug.cgi?id=1962531
nightly updates are available again

JRViejo · Apr 29, 2025

FYI. Firefox Nightly 140.0a1 Released Apr 28, 2025

Release Notes | Nightly Blog | Choose which Firefox Browser to download in your language

Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports.

Warning: Features listed here may or may not make a final release of Firefox.
Click to expand...

JRViejo · Apr 29, 2025

FYI. Firefox 139.0 Beta 1 released Apr 29, 2025.

The Firefox Beta page's Download button downloads Firefox Setup 139.0b1.exe.
Choose which Firefox Browser to download in your language.
Release Notes
System Requirements.
Next Release Date: May 27, 2025.

JRViejo · Apr 30, 2025

FYI. Mozilla Firefox, Portable Edition Nightly 140 (web browser) Released for the PA Platform, courtesy of PortableApps.com

Also: Mozilla Firefox, Portable Edition 139.0 Beta 1 (web browser) Released for the PA Platform

JRViejo · May 26, 2025

FYI. Firefox Nightly 141.0a1 Released May 26, 2025

Release Notes | Nightly Blog | Choose which Firefox Browser to download in your language

Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports.

Warning: Features listed here may or may not make a final release of Firefox.
Click to expand...

JRViejo · May 27, 2025

FYI. Firefox 140.0 Beta 1 released May 27, 2025.

The Firefox Beta page's Download button downloads Firefox Setup 140.0b1.exe.
Choose which Firefox Browser to download in your language.
Release Notes
System Requirements.

Also, Firefox 140 for Developers

This article provides information about the changes in Firefox 140 that will affect developers. Firefox 140 is the current Beta version of Firefox, and will ship on Jun 24, 2025.
Click to expand...

JRViejo · May 28, 2025

FYI. Mozilla Firefox, Portable Edition 140.0 Beta 1 (web browser) Released for the PA Platform, courtesy of PortableApps.com

Also: Mozilla Firefox, Portable Edition Nightly 141 (web browser) Released for the PA Platform

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