Billly Gates writes "In a bizarre, yet funny and ironic move, Microsoft warned web developers that using WebKit stagnates open standards and innovation on the Web. According to the call to action in its Windows Phone Developer Blog, Microsoft is especially concerned about the mobile market, where many mobile sites only work with Android or iOS with WebKit-specific extensions. Their examples include W3C code such as radius-border, which is being written as -WebKit-radius-border instead on websites. In the mobile market WebKit has a 90% marketshare, while website masters feel it is not worth the development effort to test against browsers such as IE. Microsoft's solution to the problem of course is to use IE 10 for standard compliance and not use the proprietary (yet open source) WebKit."