Mozilla Firefox before 48.0 on Android allows remote attackers to spoof the address bar via left-to-right characters in conjunction with a right-to-left character set.
https://security.gentoo.org/glsa/201701-15
https://bugzilla.mozilla.org/show_bug.cgi?id=1284372
http://www.securitytracker.com/id/1036508
http://www.securityfocus.com/bid/92260
http://www.mozilla.org/security/announce/2016/mfsa2016-82.html