Websites with charts and graphs for the most popular browsers that support different elements of HTML5 and CSS3.
Browsers like Firefox 3.6+, Safari5+, IE 9+, Chrome 10+, Opera 11+ all support HTML5 and CSS3 differently. Check out the websites below to see if your browser is compatible with HTML5 and CSS3.
Finemebyip.com does a good job of comparing different browsers capability for both Windows and Mac on HTML5 and CSS3.
Wiki Comparison of layout engines HTML5
Wiki seem to be a little outdated, so I wouldn’t trust the information here.
html5test.com test your browser and give you a score base on your browser capability with HTML5.
Mobile HTML5 test
For browsers on your mobile devices check out mobilehtml5.org
Want to know all the changes and updates going on with HTML5? Check out HTML5 Tracker.
Visit HTML5 Tracker