Browser Add-On Shows Exactly Who's Watching You Surf
http://www.techsupportalert.com/content/browser-add-shows-exactl
-whos-watching-you-surf.htm

One of the golden rules about cookies is that, for security, the
only site that can read a cookie is the one that created it in the first
place. At least, that's the theory.  And that's what the security consultants
tell you. But it's not entirely true.

What happens if two web sites happen to have their on-site
advertising provided by the same agency?  If that agency writes cookies under
its own name, can it read them both?  And can it thus track your behaviour
across both web sites?  You betcha.

Collusion examines the cookies on your PC to find out who's been
sharing information with whom.

For the FF extension go to
https://secure.toolness.com/xpi/collusion.html to
download and install the add-in.

Now, just carry on surfing as normal.  At any point, when you
want to see the results of Collusion's analysis, head to
http://collusion.toolness.org.  You will see a chart with a set of red dot
indicating cookies through which your internet activity can be tracked.

--- Thunderbird 2.0.0.24 (Windows/20100228)
 * Origin: Fidonet Via Newsreader - http://www.easternstar.info (1:123/789)