HTML5 input type number not working in firefox

Question

I am using HTML5 input type=number. Its working perfectly in Chrome browser, but its not working in Firefox and IE9.

I want to increment the quantity by

Answer 1

It is not supported in firefox or internet explorer, except for version 11 which has partial support. See this comparison matrix.

You can use the number polyfill shim to get support for unsupported browsers.