Mozilla has released security updates to address security vulnerabilities in Firefox, Firefox ESR and Thunderbird. An attacker could exploit some of these vulnerabilities to take control of an affected system. Security vulnerabilities fixed in Firefox 99, Firefox ESR 91.8 and Thunderbird 91.8.

More information on vulnerabilities and updates is available in Mozilla security advisories:

• Firefox 99
• Firefox ESR 91.8
• Thunderbird 91.8