Bad news for web developers…. Internet Explorer 9 is here. Congrats! Internet Explorer 9 requires Windows Vista or Windows 7. You can preview and test the latest features of Internet Explorer 9. Internet browsers are experiencing a cut-throat competition right now. The one which will not be able to keep up, will be perished. Internet browsers must update because HTML5 and CSS3 are changing the web all over again. These web pages will never be same with HTML5 and CSS3. Here comes the challenge for internet browsers now. So Microsoft has also launched Internet Explorer 9 which hugely supports HTML5, CSS3 and much more dynamic elements essential for web today.