One of most interesting features in new Firefox 3, which is in Beta 3 phase is anti-malware tool that blocks users from reaching the potentially malicious websites. The malware protection feature in Firefox 3.0 Beta 3 relies on a blacklist provided by Google to stymie access to potentially dangerous websites. In last couple days two new websites were blocked, DownThemAll.net and JoeHewitt.com. Both sites were barred by Firefox because Google claimed hey either pushed malware or included links that did that, so malware protection feature in Firefox 3.0 Beta 3 simply added those websites on its blacklist.
