Fake address bar and alert dialogs are tricks that target Google Chrome users to dupe them with the infamous tech support scam pop ups. The address bar is nothing but a JPEG picture that is placed at the right spot to look like an actual address bar when the page is loaded in full-screen mode. The real dialog from Google Chrome is the Prevent this page from displaying additional dialogs option particularly useful when certain websites ask you Are you sure you want to leave this page?”]