"What's more, we found that Facebook does not place any long-term identifying cookie on the opt-out sites suggested by Facebook for US and Canadian users".
"If people who are not being tracked by Facebook use the 'opt out' mechanism proposed for the EU, Facebook places a long-term, uniquely identifying cookie, which can be used to track them for the next two years," explained Günes Acar from Cosic, who also co-wrote the report.
Moreover, to give you a sense of Firesheep's scope, the extension is built to identify cookies from Amazon.com, Basecamp, bit.ly, Cisco, CNET, Dropbox, Enom, Evernote, Facebook, Flickr, Github, Google, HackerNews, Harvest, Windows Live, NY Times, Pivotal Tracker, Slicehost, tumblr, Twitter, WordPress, Yahoo, Yelp.
Intelligent Scan – This feature helps you identify the cookies that you usually use, such as logins with the most frequent sites you visit, and and it keeps them.
Unlike the Web, where the code — so-called cookies — for identifying Internet addresses is in browser software, mobile apps lack a similar tracking tool.
This includes targeting ads at those buyers when they are out surfing the web, identifying them via the cookie from the original ecommerce site.
CloudFlare's Audit will identify all the cookies floating around and will let a website owner see how other site owners have classified those cookies.
Other Web sites are more specific: Bugnosis (www.bugnosis.org) identifies the invisible cookies, known as Web bugs, that can be placed without the user's knowledge, and is available from the Privacy Foundation, a research group at the University of Denver.
The software does not identify or block cookies -- the small files used by Web sites to keep track of what Internet surfers do -- as many spyware-blocking programs do.
