PopupForm2

        public PopupForm2(CefBrowser parentBrowser, CefPopupFeatures popupFeatures, CefWindowInfo windowInfo, string url, ref CefClient client, CefBrowserSettings settings)
        {
            InitializeComponent();

            _ParentBrowser = parentBrowser;
            _PopupFeatures = popupFeatures;
            _Client = client;
            _Settings = settings;
            _WindowInfo = windowInfo;
        }

        private void PopupForm_Load(object sender, EventArgs e)
        {
            AttachControls();
        }

        public void AttachControls()
        {
            _cefWebBrowserPopUpControl = new CefWebBrowserPopUp(null/*_WindowInfo*/, _Settings);
            _cefWebBrowserPopUpControl.Dock = DockStyle.Fill;
            _BrowserHolder.Controls.Add(_cefWebBrowserPopUpControl);
            _cefWebBrowserPopUpControl.BringToFront();

            _WindowInfo.Parent = Handle;
        }