Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 115.4.0 ESR. 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) * Mozilla: Large WebGL draw could have led to a crash (CVE-2023-5724) * Mozilla: WebExtensions could open arbitrary URLs (CVE-2023-5725) * Mozilla: Improper object tracking during GC in the JavaScript engine could have led to a crash. (CVE-2023-5728) * Mozilla: Address bar spoofing via bidirectional characters (CVE-2023-5732) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.