SSO when users share a browser

[Peter Schober]

* snekse <snekse at gmail.com> [2014-07-29 22:13]:
> Currently our www site allows users to share a browser because a
> session key is contained in the URL and all the links they click on
> within the site maintain that key.

To me that means all users of that browser will share the same session
key and hence will not have seperate /anything/.

> Is it possible for users to share a browser and maintain separate
> SSO sessions?

How should the browser know who clicked on something (even if it could
maintain seperate sessions)? Integration with an integrated web cam
plus factial recognition?
-peter