H.264 playback with Firefox Plugin from Microsoft.

The codec problem Tag of HTML5 is not conclusive. And seems to be clearly divided into two sides. H.264 is supported by a third party, Microsoft and Apple. The parties do not want to use the H.264 patent reason went together to WebM led by Google (Google is actually supports H.264, but when WebM happened, it changed the direction of google.)

H.264 camp denied that Firefox is seriously beginning to offer free use of Ogg Theora with a unique opportunity to use the H.264 Firefox seems to be impossible. But today it back to the fact that the skill of the "Microsoft."

This plug-in that has a full HTML5 Extension for Windows Media Player Firefox Plug-in, which is the extension of the Windows Media Player plug-in for Firefox released a long time.

This plug-in limitation is to use on Windows 7, but the technical reasons it is called H.264 processing of Windows 7, the plug is also more like Firefox 3.6 or above can be downloaded from the HTML5 Extension for Windows Media. Player Firefox Plug-in.

Source – Blognone, TechNet.