Browser vendors often make strong claims about their responsiveness to vulnerability reports and their ability to preemptively prevent exploits. Security is becoming one of the most significant fronts in the new round of browser wars, but it's also arguably one of the hardest aspects of software to measure or quantify.
A recent contest at CanSecWest, an event that brings together some of the most skilled experts in the security community, has demonstrated that the three most popular browser are susceptible to security bugs despite the vigilance and engineering prowess of their creators. Firefox, Safari, and Internet Explorer were all exploited during the Pwn2Own competition that took place at the conference. Google's Chrome browser, however, was the only one left standing—a victory that security researchers attribute to its innovative sandbox feature.