Does your antivirus software normally tell you when software has a known flaw and needs to be updated? Just want to make sure this is a legit message and isn't leading you to a sketchy download site... There have been two recent updates to Firefox: * March 5th - 97.0.2 fixing two critical security vulnerabilities ([https://www.mozilla.org/firefox/97.0.2/releasenotes/ Release Notes]) * March 8th - 98.0 new major update fixing other security vulnerabilities ([https://www.mozilla.org/firefox/98.0/releasenotes/ Release Notes]) And for quick reference: [[Update Firefox to the latest release]]