That said, it may be possible to *detect* an existing authorization by checking for the existence of those cookies. Actually getting the info out of them to create a connection may prove more difficult, however. At one time it was fairly easy to do, but then FB changed their cookie structure and I can't say for sure what's in there now. Sounds like I need to do another investigation into the contents of the cookie. I can say that if the access token is available in the cookie then you should be able to get at it using @CookieValue (but that would require you to write a Spring MVC controller to receive it).
Spring Social Project Lead