Updated Firefox-ESR packages has been released for Debian GNU/Linux 7, 8, and 9:

DLA 1308-1: firefox-esr security update
DSA 4139-1: firefox-esr security update

DLA 1308-1: firefox-esr security update

Package : firefox-esr
Version : 52.7.1esr-1~deb7u1
CVE ID : CVE-2018-5125 CVE-2018-5127 CVE-2018-5129 CVE-2018-5130
CVE-2018-5131 CVE-2018-5144 CVE-2018-5145

Several security issues have been found in the Mozilla Firefox web
browser: Multiple memory safety errors and other implementation errors
may lead to the execution of arbitrary code or denial of service.

For Debian 7 "Wheezy", these problems have been fixed in version
52.7.1esr-1~deb7u1.

We recommend that you upgrade your firefox-esr packages.

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

DSA 4139-1: firefox-esr security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4139-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
March 15, 2018 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : firefox-esr
CVE ID : CVE-2018-5125 CVE-2018-5127 CVE-2018-5129 CVE-2018-5130
CVE-2018-5131 CVE-2018-5144 CVE-2018-5145

Several security issues have been found in the Mozilla Firefox web
browser: Multiple memory safety errors and other implementation errors
may lead to the execution of arbitrary code, denial of service or
information disclosure.

For the oldstable distribution (jessie), these problems have been fixed
in version 52.7.1esr-1~deb8u1.

For the stable distribution (stretch), these problems have been fixed in
version 52.7.1esr-1~deb9u1.

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/