Microsoft has a plug-in for Firefox published with the users of the open-source browser in Windows 7 HTML 5 video in H.264 format to play. The module uses the operating system built in native support for HTML 5. "H.264 is a common standard with a strong hardware support," says Microsoft. "It gives users the ability to provide self-recorded movies on the Internet and a browser on all operating systems and all play equipment that support H.264." Were one example of PCs with Windows 7.

With the H.264 support, Microsoft has expanded its capabilities in Windows Media Player plug-ins , which can play back WMA video with Firefox. It can be downloaded free of charge . The plug-in supports Firefox 3.6 and the latest beta of Firefox 4 in Windows 7. What standard format for video in HTML 5 As for competing, H.264 with the open standard Ogg Theora Google VP8 . With HTML 5 you can embed videos directly in a page without plug-ins like Adobe Flash or Microsoft Silverlight. The development of the participating companies were able to so far but no format to some. Microsoft sets the Internet Explorer 9 on H.264 . In addition to the largest video streaming sites YouTube and Vimeo also support the Safari browser, Chrome, and the proprietary codec. Mozilla and Opera on the other hand favor the free competition format Ogg Theora.