Earlier today, Mozilla released update 2.0.0.13, which patches 10 vulnerabilities in Firefox 2.0. Two of the patched problems were given a "Critical" rating, and another two were rated as "High" - and all four of these security flaws can be taken advantage of via nothing more than normal browsing activity. Users of Thunderbird and SeaMonkey are also affected, and all Firefox users who do not have automatic updating enabled are strongly advised to download the fixes.