Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.12.0. Security Fix: * Mozilla: Memory safety bugs fixed in Firefox 103 and 102.1 * Mozilla: Directory indexes for bundled resources reflected URL parameters * Mozilla: Mouse Position spoofing with CSS transforms For more details about the security issue, including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.