source: https://www.securityfocus.com/bid/35803/info Mozilla Firefox is affected by a URI-spoofing vulnerability. An attacker may leverage this issue by inserting arbitrary content to spoof a URI presented to an unsuspecting user. This may lead to a false sense of trust because the victim may be presented with a URI of a seemingly trusted site while interacting with the attacker's malicious site. This issue affects Firefox versions prior to 3.5.2 and 3.0.13.
Juan Pablo Lopez Yacubian