Last sentence is sort of convoluted What I mean is if "modern" browser vendors change their popular browsers to make it more difficult for users to control oth

Last sentence is sort of convoluted What I mean is if "modern" browser vendors change their popular browsers to make it more difficult for users to control others' Javascript, we can use URL blocking, URL rewriting and/or page rewriting to modify or delete inline or sourced Javascript and/or substitute the user's own Javascripts