The WebExtension APIs in Mozilla Firefox before 43.0 allow remote attackers to gain privileges, and possibly obtain sensitive information or conduct cross-site scripting (XSS) attacks, via a crafted web site.
lists.fedoraproject.org/pipermail/package-announce/2015-December/174083.html
lists.fedoraproject.org/pipermail/package-announce/2015-December/174253.html
lists.opensuse.org/opensuse-updates/2015-12/msg00104.html
lists.opensuse.org/opensuse-updates/2016-02/msg00007.html
lists.opensuse.org/opensuse-updates/2016-02/msg00008.html
www.mozilla.org/security/announce/2015/mfsa2015-148.html
www.securityfocus.com/bid/79280
www.securitytracker.com/id/1034426
www.ubuntu.com/usn/USN-2833-1
bugzilla.mozilla.org/show_bug.cgi?id=1226423
security.gentoo.org/glsa/201512-10