A number of vulnerabilities have recently been identified in Firefox 6 and all 3.6 versions prior to 3.6.23. It is recommended that version 7 be installed as soon as possible. Similar vulnerabilities have been identified in Thunderbird and SeaMonkey versions prior to 2.4. Please download the latest versions from mozilla.com
Some problems have been identified with version 7 of Firefox with flash videos. The solution seems to be to update flash. After installing version flash version 11 the problem was addressed.