As promised, we have changed the login procedure. This change should improve your users experience and requires no modifications to existing applications. Now, if a user was already using Facebook, logging into an app happens transparently. Because of this, developers might want to provide a way for users to logout by posting the word "confirm" to http://www.facebook.com/logout.php. Alternatively, developers can provide a link to switch the user via the login page’s "skipcookie" parameter (as described in the authentication guide.
p> We have also increased the session timeouts for desktop and web applications to 24 hours. To extend the session beyond 24 hours, a web app can transparently link the user to the login page which will automatically redirect back to your application with a new session key. Desktop applications can extend their session as usual by simply making API requests.
p> Finally, we thought you guys might be interested in a new Facebook Toolbar built for Firefox. It’s open source, so if you’re interested in adding functionality (or porting it to another browser), join the discussion thread!