High Quality Content by WIKIPEDIA articles! MathPlayer is a program by Design Science that enables the display of MathML mathematical formulae in Internet Explorer. MathML is a 1998 recommendation of the W3C for displaying formulae on the World Wide Web. While most leading browsers based on Mozilla (Firefox), WebKit (Safari, Chrome) and Presto (Opera) have native support for displaying MathML, Internet Explorer needs a plug-in such as MathPlayer.