Mozilla Firefox before 26.0 does not properly remove the Application Installation doorhanger, which makes it easier for remote attackers to spoof a Web App installation site by controlling the timing of page navigation.
http://www.ubuntu.com/usn/USN-2052-1
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00002.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00087.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00086.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00085.html
http://lists.opensuse.org/opensuse-security-announce/2013-12/msg00010.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124257.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/123437.html