Mozilla Firefox before 29.0 on Android allows remote attackers to spoof the address bar via crafted JavaScript code that uses DOM events to prevent the reemergence of the actual address bar after scrolling has taken it off of the screen.
https://bugzilla.mozilla.org/show_bug.cgi?id=960146
http://www.securitytracker.com/id/1030163
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.mozilla.org/security/announce/2014/mfsa2014-40.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-May/132437.html