Mozilla Firefox before 16.0 on Android assigns chrome privileges to Reader Mode pages, which allows user-assisted remote attackers to bypass intended access restrictions via a crafted web site.
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html
http://secunia.com/advisories/50856
http://www.mozilla.org/security/announce/2012/mfsa2012-78.html