Mozilla Firefox Version 149.0 Released with Security Updates

Started by Corrine, March 24, 2026, 03:14:34 PM

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Corrine

Mozilla sent Firefox Version 149.0 to the release channel.

The update includes forty-six security updates of which nineteen (19) are rated critical, twenty-one (21) are rated moderate, and six (6) are rated low. The security updates can be reviewed here.

This is a major update with new features, fixes, and changes included in the update.  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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