The Official Mozilla blog says that there are new security updates available for Firefox today. You can either download the update manually by following the link above or through your browser by using the 'check for updates' feature in the help menu. Word is: "As part of Mozilla Corporation's ongoing stability and security update process, Firefox 3.0.4 and Firefox 2.0.0.18 are now available for Windows, Mac, and Linux as free downloads. We strongly recommend that all Firefox users upgrade to this latest release. If you already have Firefox 3 or Firefox 2, you will receive an automated update notification within 24 to 48 hours. This update can also be applied manually by selecting 'Check for Updates…' from the Help menu."