A firefox-esr security update has been released for Debian GNU/Linux 10 LTS to address multiple security issues.

DSA 5385-1: firefox-esr security update

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Debian Security Advisory DSA-5385-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
April 12, 2023   https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2023-1945 CVE-2023-29533 CVE-2023-29535 CVE-2023-29536
CVE-2023-29539 CVE-2023-29541 CVE-2023-29548 CVE-2023-29550
Debian Bug : 982794

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 stable distribution (bullseye), these problems have been fixed in
version 102.10.0esr-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/