Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This update upgrades Firefox to version 115.11.0 ESR. Security Fix: firefox: Arbitrary JavaScript execution in PDF.js firefox: IndexedDB files retained in private browsing mode firefox: Potential permissions request bypass via clickjacking firefox: Cross-origin responses could be distinguished between script and non-script content-types firefox: Use-after-free could occur when printing to PDF firefox: Memory safety bugs fixed in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11 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.