I would like to add a tab (app) to my Facebook page, which opens a certain ulr in another tab / window (tab would be better). I found apps.facebook.com/iframehost, and it does exactly what is needed (redirects to a different url from a Facebook tab), but there is no way to open this url in another tab/window (again, tab is what I am looking for). Does anybody have an idea how to do it?

Thank you.