Mozilla has released security updates to address vulnerabilities (CVE-2021-29951, CVE-2021-29952, CVE-2021-29953) 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 88.0.1, Firefox for Android 88.1.3, Firefox ESR 78.10.1, Thunderbird 78.10.1.

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

• Firefox 88.0.1, Firefox for Android 88.1.3

• Firefox ESR 78.10.1

• Thunderbird 78.10.1