Mozilla has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird. A remote attacker could exploit some of these vulnerabilities to take control of an affected system. Security Vulnerabilities fixed in Firefox 87, Firefox ESR 78.9, Thunderbird 78.9.

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

• Firefox 87

• Firefox ESR 78.9

• Thunderbird 78.9