[Arkcon]

Just recently I was having some problems with my cookie management add-on programs and decided to just use what comes with Firefox. And I learned an interesting tidbit -- when you google for Best Buy or Amazon dot com, Best Buy and Amazon send a cookie through the google page. Likewise there's a very common cookie, googleadservices, that many non-affiliated websites use. So at least, your computer broadcasts where you've even looked for shopping.