Mozilla Releases Security Updates for Firefox, Firefox ESR, and Thunderbird

Original release date: March 24, 2021

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.  

CISA encourages users and administrators to review the Mozilla security advisories for Firefox 87, Firefox ESR 78.9, and Thunderbird 78.9.

This product is provided subject to this Notification and this Privacy & Use policy.