Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.6.0. Security Fix(es): * Mozilla: Extensions could have bypassed permission confirmation during update (CVE-2022-22754) * Mozilla: Memory safety bugs fixed in Firefox 97 and Firefox ESR 91.6 (CVE-2022-22764) * Mozilla: Drag and dropping an image could have resulted in the dropped object being an executable (CVE-2022-22756) * Mozilla: Sandboxed iframes could have executed script if the parent appended elements (CVE-2022-22759) * Mozilla: Cross-Origin responses could be distinguished between script and non-script content-types (CVE-2022-22760) * Mozilla: frame-ancestors Content Security Policy directive was not enforced for framed extension pages (CVE-2022-22761) * Mozilla: Script Execution during invalid object state (CVE-2022-22763) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.