Mozilla Firefox before 44.0 on Android allows remote attackers to spoof the address bar via a data: URL that is mishandled during (1) shortcut opening or (2) BOOKMARK intent processing.
https://security.gentoo.org/glsa/201605-06
https://bugzilla.mozilla.org/show_bug.cgi?id=1208525
http://www.securitytracker.com/id/1034825
http://www.mozilla.org/security/announce/2016/mfsa2016-05.html