Honestly, in my view "guidelines" is even a strong word for what Microsoft did with the browser and "standards." This is not to hate on MS at all but honestly, even though you could, I suppose, argue IE has gotten much better, I don't really see a reason for it to exist anymore. It's been such a bad boy and has so few redeeming features that I really think the "blue e" on the desktop should be made to be like simply a shortcut to whatever your default browser is, be it Chrome, Firefox, Opera, or whatever (but not IE because it's development, in my view, should stop).