I realize this is an old thread, but I stumbled on it while looking for something else and thought I would share an idea.
You can add a Webhook response module that will serve up HTML which in turn loads the page then immediately closes it via script. Here is how the module looks:
When clicked, this will still open a tab, but will then immediately attempt to close it. Doesn’t work every time due to various security settings, but it might help!
webhook_response_close_window.json (4.1 KB)