Internet Explorer 10 for the next version, Michael Muchmore of "PC Magazine" tested Platform Preview 1's performance and HTML5 support with both Microsoft's and third parties' test suites. In his test, Platform Preview 1 performed better than Internet Explorer 9 but not always better than the competing web browsers. On September 13, 2011, Microsoft released the developer preview of Windows 8 to general public, which came with Internet Explorer Developer Preview (the first full browser incarnation of Internet Explorer 10). Although Internet Explorer is the last major web browser – among Mozilla Firefox, Google Chrome, Opera, and Safari – to support spell checking,
Pwn2Own not show up. No teams showed up for day three. Chrome and Firefox were not hacked. For 2012 the rules were changed to a capture-the-flag style competition with a point system. The new format caused Charlie Miller, successful at the event in past years, to decide not to attend. At Pwn2Own, Chrome was successfully exploited for the first time. VUPEN declined to reveal how they escaped the sandbox, saying they would sell the information. Internet Explorer 9 on Windows 7 was successfully exploited next. Firefox was the third browser to be hacked using a zero day exploit. Safari on Mac