player/js/utils/featureSupport.js

var featureSupport = (function(){
	var ob = {
		maskType: true
	};
	if (/MSIE 10/i.test(navigator.userAgent) || /MSIE 9/i.test(navigator.userAgent) || /rv:11.0/i.test(navigator.userAgent) || /Edge\/\d./i.test(navigator.userAgent)) {
	   ob.maskType = false;
	}
	return ob;
}());