protected override bool OnContextMenuCommand(CefBrowser browser, CefFrame frame, CefContextMenuParams state, int commandId, CefEventFlags eventFlags) { if (commandId == (int)ContextMenuHelper.MenuIdentifier.MENU_ID_SHOW_DEVTOOLS) { _owner.ShowDevTools(); return(true); } if (commandId == (int)ContextMenuHelper.MenuIdentifier.MENU_ID_HIDE_DEVTOOLS) { _owner.WebView.BrowserHost.CloseDevTools(); return(true); } var e = new ContextMenuCommandEventArgs(frame, state, commandId, eventFlags); _owner.InvokeIfRequired(() => _owner.OnContextMenuCommand(e)); return(e.Handled); }