Mozilla has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird. An attacker could exploit some of these vulnerabilities to take control of an affected system.
National CERT recommends all users to update their versions Firefox 80, Firefox ESR 68.12, Firefox ESR 78.2, Thunderbird 68.12 and Thunderbird 78.2, in order to avoid exploitation of these vulnerabilities.
For more details please visit: Mozilla Firefox