Internet Explorer 4 0 doesn t show visited links?

The fact that Firefox has fewer and less severe publicly known unpatched security vulnerabilities than Internet Explorer (see Comparison of web browsers) is often cited as a reason to switch from Internet Explorer to Firefox for improved security. A 2006 Symantec study showed that Firefox had surpassed Internet Explorer in the number of vendor-confirmed vulnerabilities that year through to September, though these were patched more quickly than vulnerabilities found in other browsers. Symantec later clarified their statement, saying that Firefox still had fewer security vulnerabilities, as counted by security researchers.