There exists a remotely exploitable code execution vulnerability in Mozilla Firefox related to the order tags appear in an HTML document. It is possible for a malicious web page to execute arbitrary code as the user running Firefox.
Lifting embargo
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0328.html