McAfee SiteAdvisor is a security add-on for your Firefox browser that helps you identify sites that are linked to spyware, adware, spam, viruses, browser-based attacks, phishing, or online fraud. The SiteAdvisor service is based on a huge database with detailed test results for more than 100,000 pieces of software and covers more than 90% of the world`s Web traffic. The program integrates with search engine results from popular search engines and also adds an icon to the browser toolbar that indicates whether a site is safe to use, or should be used with caution. If SiteAdvisor has negative information for a site, you can review a very detailed report that shows any spam received from that site, harmful downloads, and association with other sites. An excellent browser add-on, that provides an in-depth site analysis that is based on actual test results, rather than assumptions.