@Override
      public void onBeforeContextMenu(CefBrowser browser, CefFrame frame, CefContextMenuParams params, CefMenuModel model) {
        model.clear();
        super.onBeforeContextMenu(browser, frame, params, model);
      }
@Override
      public void onBeforeContextMenu(CefBrowser browser, CefFrame frame, CefContextMenuParams params, CefMenuModel model)