They got a point. IE has its own venerabilities and Chrome has some too, maybe less maybe more. Also we can factor the plugin since it can have its own security

They got a point. IE has its own venerabilities and Chrome has some too, maybe less maybe more. Also we can factor the plugin since it can have its own security risks. So statically IE using the Chrome Frame is more exposed then IE alone. It sounds like MS are clutching but they still raise a valid point. BTW I can't remember hearing that Mozilla are complaining about IE Tab.