Mozilla Firefox is vulnerable to type confusion. Ionmonkey type confusion with proto mutations.
access.redhat.com/errata/RHSA-2019:0672
access.redhat.com/errata/RHSA-2019:0966
access.redhat.com/errata/RHSA-2019:1144
access.redhat.com/security/updates/classification/#critical
bugzilla.mozilla.org/show_bug.cgi?id=1538006
www.mozilla.org/en-US/security/advisories/mfsa2019-10/
www.mozilla.org/security/advisories/mfsa2019-09/
www.mozilla.org/security/advisories/mfsa2019-10/
www.mozilla.org/security/advisories/mfsa2019-12/