Mozilla Firefox before 40.0 allows man-in-the-middle attackers to bypass a mixed-content protection mechanism via a feed: URL in a POST request.
lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html
www.mozilla.org/security/announce/2015/mfsa2015-86.html
www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
www.securityfocus.com/bid/76510
www.securitytracker.com/id/1033247
bugzilla.mozilla.org/show_bug.cgi?id=1148732
security.gentoo.org/glsa/201605-06