Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.10.0. Security Fix: * Mozilla: Braille space character caused incorrect sender email to be shown for a digitally signed email * Mozilla: Cross-Origin resource"s length leaked * Mozilla: Heap buffer overflow in WebGL * Mozilla: Browser window spoof using fullscreen mode * Mozilla: Register allocation problem in WASM on arm64 * Mozilla: Uninitialized variable leads to invalid memory read * Mozilla: Memory safety bugs fixed in Firefox 101 and Firefox ESR 91.10 * Mozilla: Querying a WebAuthn token with a large number of allowCredential entries may have leaked cross-origin information 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.