Mozilla sent Firefox Version 140.0 to the release channel.
The update includes thirteen security updates of which two (2) are rated critical, six (6) are rated moderate, and five (5) are rated low. The security updates can be reviewed here (https://www.mozilla.org/en-US/security/advisories/mfsa2025-51/).
Many new features are included in the update. To review all of the new features, see the Release Notes (https://www.mozilla.org/en-US/firefox/140.0/releasenotes/).
Update: To get the update now, select "Help" from the Firefox menu and pick "About Firefox". Mac users need to select "About Firefox" from the Firefox menu. If you do not use the English language version, Fully Localized Versions (https://www.mozilla.org/en-US/firefox/all/#product-desktop-release) are available for download.
Rapid Release Calendar (https://wiki.mozilla.org/Release_Management/Calendar)
140.0.1 available through internal updater
The update contains two fixes:
Fixed- Fixed text contrast issues in the sidebar with some dark themes. (Bug 1971487 (https://bugzilla.mozilla.org/show_bug.cgi?id=1971487))
- Fixed a startup crash experienced by some users caused by DLL injection. (Bug 1973947 (https://bugzilla.mozilla.org/show_bug.cgi?id=1973947))
Update: To get the update now, select "Help" from the Firefox menu, then pick "About Firefox". Mac users need to select "About Firefox" from the Firefox menu. For non-English versions, Fully Localized Versions (https://www.mozilla.org/en-US/firefox/all/#product-desktop-release) are available for download.
Release Notes (https://www.mozilla.org/en-US/firefox/140.0.1/releasenotes/)
140.0.2 released to fix a crash in Windows
Release notes: https://www.mozilla.org/en-US/firefox/140.0.2/releasenotes/