A firefox-esr security update has been released for Debian GNU/Linux 11 to address multiple security issues that could potentially result in the execution of arbitrary code, information disclosure, or spoofing.

DSA 5322-1: firefox-esr security update

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Debian Security Advisory DSA-5322-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
January 18, 2023   https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2022-46871 CVE-2022-46877 CVE-2023-23598 CVE-2023-23601
CVE-2023-23602 CVE-2023-23603 CVE-2023-23605

Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code, information disclosure or spoofing.

For the stable distribution (bullseye), these problems have been fixed in
version 102.7.0esr-1~deb11u1.

We recommend that you upgrade your firefox-esr packages.

For the detailed security status of firefox-esr please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/firefox-esr

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/