Mozilla firefox is vulnerable to denial of service (DoS). The vulnerability exists due to ,emory safety bugs fixed in Firefox 71 and Firefox ESR 68.3.
lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
access.redhat.com/errata/RHSA-2019:4108
access.redhat.com/errata/RHSA-2020:0292
access.redhat.com/errata/RHSA-2020:0295
access.redhat.com/security/updates/classification/#critical
bugzilla.mozilla.org/buglist.cgi?bug_id=1449736%2C1533957%2C1560667%2C1567209%2C1580288%2C1585760%2C1592502
security.gentoo.org/glsa/202003-02
security.gentoo.org/glsa/202003-10
usn.ubuntu.com/4241-1/
usn.ubuntu.com/4335-1/
www.mozilla.org/en-US/security/advisories/mfsa2019-37/
www.mozilla.org/security/advisories/mfsa2019-36/
www.mozilla.org/security/advisories/mfsa2019-37/
www.mozilla.org/security/advisories/mfsa2019-38/