At the Pwn2Own hacking competition two researchers hacked the four major browsers, Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, and Apple Safari. Korean researcher Jung Hoon Lee earned $110,000 in just two minutes, the man used 2000 lines of code to take down both stable and beta versions of Chrome by exploiting a buffer overflow race condition in the browser. Lee also hacked in the same day a 64-bit version of IE 11 exploiting a time-of-check to time- of-use (TOCTOU) vulnerability.”]
Source: https://securityaffairs.co/wordpress/35141/hacking/major-browsers-hacked-pwn2own.html