I want to embed the current Gecko in my WPF-Project. I know there is the possibility with the Winforms-Host and the Skybound-Gecko-Library.
But I do not use the standard
You can probably use WindowsFormsHost, tutorial here
https://nhabuiduc.wordpress.com/2014/09/18/geckofx-net-webbrowser-setup-and-features/
the interesting part is
WindowsFormsHost host = new WindowsFormsHost();
GeckoWebBrowser browser = new GeckoWebBrowser();
host.Child = browser;
gridWeb.Children.Add(host);