Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 91.8.0 ESR. Security Fix: * Mozilla: Use-after-free in NSSToken objects * Mozilla: Out of bounds write due to unexpected WebAuthN Extensions * Mozilla: Memory safety bugs fixed in Firefox 99 and Firefox ESR 91.8 * Mozilla: Use-after-free after VR Process destruction * Mozilla: Use-after-free in DocumentL10n::TranslateDocument * Mozilla: Incorrect AliasSet used in JIT Codegen * Mozilla: Denial of Service via complex regular expressions * Mozilla: iframe contents could be rendered outside the border 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.