Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 78.6.1 ESR. Security Fix: * Mozilla: Use-after-free write when handling a malicious COOKIE-ECHO SCTP chunk 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.