How can I log out of one browser? I don't mind whether it's per site or for all Stack Exchange sites, though having both would be nice.
I tried the stackexchange.com ”log out” link, which claims to “clear all local credentials in your browser”. But that only logged me out of http://stackexchange.com/, not out of the Q&A sites. And contrary to the claim it also logged me out of other clients.
So how can I log out of one client while staying logged in in other browsers?