Instead of convincing people to switch to Internet Explorer; Microsoft released a plug-in for Firefox. This plug-in lets Windows 7 users watch videos encoded in H.264 format. Previously, users couldn’t watch those videos on the HTML5 platform because of Firefox’s limitations.
The plug-in gets to access the H.264 support that is already been built into Windows 7. Technically, whenever you access a video from an HTML5 webpage, the video tags are replaced by a call to the Windows Media Player plug-in. This plug-in then allows you to play content directly on the page.
If you’re not using Firefox simply because of this problem, you can now change back to your beloved browser. You can download the plug-in from this link. Oh yes, your Firefox version has to be v 3.60 or latest version 4.0 beta.