The most common and impactful security threats facing users today are socially engineered malware and phishing attacks. As such, they have been the primary focus of NSS Labs continued research and testing of the security effectiveness of browsers. While drive-by downloads and clickjacking are also effective attacks that have achieved notable publicity, they represent a smaller percentage of today’s threats. Drive-by downloads are commonly the result of a successful phishing attack and clickjacking attacks often lead to a phishing web page.
Read more and see the results: http://www.nsslabs.com/reports/browser-security-comparative-analysis-phishing-protection