Browsers which support html5

Answer 1

mobile like android ,iphones,ipads supports high html5 ( google chrome,apple safari ,mozilla firefox)

Answer 2

Taken from https://www.w3schools.com/html/html5_browsers.asp

HTML5 Browser Support

HTML5 is supported in all modern browsers.
In addition, all browsers, old and new, automatically handle unrecognized elements as inline elements.
Because of this, you can "teach" older browsers to handle "unknown" HTML elements.
You can even teach IE6 (Windows XP 2001) how to handle unknown HTML elements.