Tuesday, October 13, 2026

Mozilla Firefox Version 158.0 Released with Security Updates

 

Mozilla sent Firefox Version 158.0 to the release channel. 

The update includes 77 security updates in which 30 are rated critical, 33 rated moderate and 14 rated low. The security updates can be reviewed here.  

Note:  The number of security updates is due to Mozilla no longer rolling all internally identified memory safety vulnerabilities into a single CVE.  Instead, they are now issuing an advisory for every individual bug.

The update also includes five new features, one change and four fixes. To review the new features, changes and fixes, see the Release Notes.

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 are available for download.

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