ChromiumWebBrowser - How to add new Popup in a tab from code?

Question

i can easly create a new tab inside of the tabcontrol with this code :

    public void addNewTab3(string url)
    {
        TabPage tpage = new TabPage();
        tpage.Text = "New Tab";
        tabControl1.Controls.Add(tpage);
        tabControl1.SelectTab(tabControl1.TabCount - 1);
        ChromiumWebBrowser browser = new ChromiumWebBrowser(url);
        browser.Parent = tpage;
        browser.Dock = DockStyle.Fill;
    }

.

chromeBrowser.ExecuteScriptAsync(@" document.getElementsByName('testbutton')[0].click();");

This opens a new window (popup), but how can the chromeBrowser.ExecuteScript.... opens a new tab and switch to them instead of a new window?

i tryed too with that code, but it too doesnt work :(

chromeBrowser.ExecuteScriptAsync(@"document.querySelector('.btn3').setAttribute('target', '_blank');");
chromeBrowser.ExecuteScriptAsync(@"document.querySelector('.btn3').click();");