"Firefox 3.0′s new anti-malware blocker, a tool that prevents some malicious pages from loading, is the browser upgrade’s most important new security feature, Mozilla Corp.’s head of engineering said today.
Officially dubbed Malware Protection, the tool warns users when they steer Firefox to sites that are known to install viruses, spyware, Trojan horses and other malicious code. When a user tries to reach a site on the banned list, a large red warning appears in lieu of the page. The warning says that the intended destination "has been reported as an attack site and has been blocked based on your security preferences." A button labeled "Get me out of here!" returns Firefox to the browser’s home page." – Content courtesy of Mozilla raises Firefox security bar