IE is 58% of the global desktop market, so monopoly rules would not apply. Google similarly locks out old versions of Chrome and Firefox as well due to not sup

IE is 58% of the global desktop market, so monopoly rules would not apply. Google similarly locks out old versions of Chrome and Firefox as well due to not supporting modern CSS3/HTML5/JS standards. Remember, Google isn't locking IE out at all. Both IE10 and IE11 will continue to be supported. Google's stated policy is to support the current and prior major release of all supported browsers (IE, Firefox, Chrome and Safari). Microsoft itself has a similar policy of only supporting the relatively modern versions in their online Office suite. They don't support IE8 but do support IE9. That means Windows XP users can't use IE to access Microsoft's online office suite.