Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 improperly control the ability of a web worker to create a WebSocket object, which allows remote attackers to bypass intended mixed-content restrictions via crafted JavaScript code.
https://security.gentoo.org/glsa/201512-10
https://bugzilla.mozilla.org/show_bug.cgi?id=1204269
http://www.ubuntu.com/usn/USN-2819-1
http://www.ubuntu.com/usn/USN-2785-1
http://www.securitytracker.com/id/1034069
http://www.securityfocus.com/bid/77411
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.mozilla.org/security/announce/2015/mfsa2015-132.html
http://www.debian.org/security/2015/dsa-3410
http://www.debian.org/security/2015/dsa-3393
http://rhn.redhat.com/errata/RHSA-2015-2519.html
http://rhn.redhat.com/errata/RHSA-2015-1982.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00049.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00013.html