Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 68.7.0. Security Fix: * Mozilla: Use-after-free while running the nsDocShell destructor * Mozilla: Use-after-free when handling a ReadableStream * Mozilla: Uninitialized memory could be read when using the WebGL copyTexSubImage method * Mozilla: Memory safety bugs fixed in Firefox 75 and Firefox ESR 68.7 * Mozilla: Out of bounds write in GMPDecodeData when processing large images 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.