The Mozilla Foundation has issued "critical" security updates to vulnerabilities discovered in the Firefox browser, Thunderbird e-mail client and SeaMonkey application suite.Flaws were found in versions of the open-source software prior to both Firefox 2.0.0.1 and Firefox 1.5.0.9, as well as prior to Thunderbird 1.5.0.9 and SeaMonkey 1.0.7, Mozilla said Tuesday.     more....