Mariusz Mlynski is a security researcher from Poland who was awarded with $55,000 at HP's Pwn2Own 2014 hacking contest for exploiting Firefox wherein he was able to execute a fundamental flaw to escalate to system privileges in Windows.
Gained instant fame for participating at Pwn2Own 2014
https://www.youtube.com/watch?v=nB16mW8hO2A
http://news.softpedia.com/news/Zero-Days-for-Firefox-IE-11-Adobe-s-Flash...
http://community.hpe.com/t5/Security-Research/Pwn2Own-2015-Day-One-resul...