Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 115.4.1. Security Fix(es): * Mozilla: Queued up rendering could have allowed websites to clickjack (CVE-2023-5721) * Mozilla: Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4 (CVE-2023-5730) * libvpx: crash related to VP9 encoding in libvpx (CVE-2023-44488) ...