NSS Labs - 2013 Browser Security Comparative Analysis: Socially Engineered Malware
Internet Explorer 10 had the highest malware block rate at 99.96%, followed by Chrome 25/26 at 83.16%. Safari 5 and Firefox 19 were a distant third and fourth, with 10.15% and 9.92% respectively. Opera offered virtually no malicious download protection, with a 1.87% score.
TechWorld.com > Internet Explorer 10 blocks more malware than Chrome or Firefox, test finds