Firefox 3.0 recorded usage share of web browsers. Estimates of Firefox 3.0's global market share were generally in the range of 4–5%, and then dropped as users migrated to Firefox 3.5 and later Firefox 3.6. Partially as a result of this, between mid-December 2009 and the end of January 2010, Firefox 3.5 was the most popular browser (when counting individual browser versions), passing Internet Explorer 7. Mozilla ended support for Firefox 3 on March 30, 2010 with the release of 3.0.19. Firefox 3.0 was developed under the codename "Gran Paradiso". This, like other Firefox codenames, is the name of an actual place;
Pwn2Own $140,000 in prize money. Internet Explorer 11 on Windows 8.1 was successfully exploited by Sebastian Apelt and Andreas Schmidt for a prize of $100,000. Mozilla Firefox was exploited by Jüri Aedla, Mariusz Młyński, and George Hotz each independently, winning $50,000 each. An anonymous participant exploited Google Chrome; however, upon review contest judges declared this a partial win due to one portion of the presentation’s collision with a vulnerability exploited earlier in the week in the Pwnium competition. In 2015, every single prize available was claimed. In 2016, Chrome, Microsoft Edge and Safari were all hacked. Firefox did not even participate