1) css3 3D effects are hardware accelerated
To benefit this GPU acceleration, could do following to be benefited but this approach is not guaranteed:
On the other hand, if hardware acceleration is disabled, the css3 effects may not work as expected. Eg: http://stackoverflow.com/questions/10746712/css3-translatez-doesnt-work-for-chrome
To verify whether it’s enabled, in chrome url, type: “about:gpu”, “about:flags”.
3) Self closing tag is not valid in HTML5 (but valid in xhtml):
eg: <div /> means <div> in HTML5 but in xhtml, it means <div></div>