private Scene createScene(){
        Group root = new Group();
        Scene scene = new Scene(root, Color.BLUE);
        WebView wv = new WebView();
        WebEngine browser = wv.getEngine();
        root.getChildren().add(wv);
        browser.load("http://habrahabr.ru");

        return scene;
    }

WebView wv = new WebView();
        WebEngine browser = wv.getEngine();
        GridPane gp= new GridPane();
        gp.setAlignment(Pos.CENTER);
        gp.setPadding(new Insets(10, 10, 10, 10));
        gp.setHgap(10);
        gp.setVgap(10);
        Scene scene = new Scene(gp, Color.BLUE);
 
        wv.setMaxWidth(Double.MAX_VALUE);
        wv.setMaxHeight(Double.MAX_VALUE);
 
     gp.getChildren().add(wv);
 
        browser.load("http://habrahabr.ru");
 
        return scene;