A firefox-esr security update has been released for Debian GNU/Linux 11 and 12 to address multiple security issues.

[SECURITY] [DSA 5450-1] firefox-esr security update

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Debian Security Advisory DSA-5450-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
July 07, 2023 https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2023-37201 CVE-2023-37202 CVE-2023-37207 CVE-2023-37208
CVE-2023-37211

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

For the oldstable distribution (bullseye), these problems have been fixed
in version 102.13.0esr-1~deb11u1.

For the stable distribution (bookworm), these problems have been fixed in
version 102.13.0esr-1~deb12u1.

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/