Flash cookies

[Michael Kann]

At this site you can see all the flash cookies that have been stored on your computer. These cookies aren't cleaned out when you "clear cookies." They get through even when you are "private browsing" with Firefox. I don't remember ever giving permission to any of the websites I see on my list. 

http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager06.html