use conditional css so that styles are only applied to IE 9 and 10
for example:
<!--[if gt IE 8]>
<style type="text/css">
* { -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; };
</style>
<![endif]-->
see this page for more details:
http://www.quirksmode.org/css/condcom.html