Run HTML5test.com on the system WebView
Run this app to test the HTML5 capabilities of the Android WebView of your phone or tablet.
Even though Android comes with a standard WebView, many device manufacturers have created their own versions - each one slightly different from the other. You can use this app to see which features of HTML5 your WebView supports. For more information see http://slides.com/html5test/the-android-browser#/