Results taken from http://nsslabs.com/browser-security
The first results are efficiency against malware, the second against phishing (as the images tell themselves, too)
edit:
The reports themselves:
Malware: http://nsslabs.com/test-reports/NSS Labs Browser Security - Socially Engineered Malware Q3 2009.pdf
Phishing: http://nsslabs.com/test-reports/NSS Labs Browser Security - Phishing Q3 2009.pdf
The first results are efficiency against malware, the second against phishing (as the images tell themselves, too)
edit:
The reports themselves:
Malware: http://nsslabs.com/test-reports/NSS Labs Browser Security - Socially Engineered Malware Q3 2009.pdf
Phishing: http://nsslabs.com/test-reports/NSS Labs Browser Security - Phishing Q3 2009.pdf