The Form Fill feature in Firefox before 1.0.1 allows remote attackers to steal potentially sensitive information via an input control that monitors the values that are generated by the autocomplete capability.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10825
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A100039
https://bugzilla.mozilla.org/show_bug.cgi?id=270697
http://www.securityfocus.com/bid/12659
http://www.redhat.com/support/errata/RHSA-2005-176.html