Fire Alarm Companies

Over 300 users have already offered assistance to our project on the use of crowdsourcing sites cookies - this is the first version

More information about cookies and most prolific proponents of our study.

involved in collecting data to monitor the persecutors.

The "Tracking the Trackers" project since last Friday asked site users to send anonymous information on Web pages they visit and trace files ("cookies" ) that instead of sites.

Since then, over 300 users have downloaded information on the relationships between more than 16,000 websites and cookies, building a database the most comprehensive available in the prevalence of Web Cookies .

The project is still accepting new data, but published the current top 10 trace files on the Internet, to begin to investigate reports of each track, and that companies are behind them. Below, with the number of websites that try to put the cookie on users' computers:

1. doubleclick.net (863 sites)

2. quantserve.com (531 sites)

3. scorecardresearch.com (507 sites)

4. facebook.com (488 sites)

5. twitter.com (378 sites)

6. google.com (306 sites)

7. addthis.com (275 sites)

other in the top 10 come from suppliers that most users have never heard of. The Guardian is investigating who is behind each of them, this kind of information that tracks and for what purposes.
The Guardian encouraged its users to support research by downloading a free application called collusion, built by Mozilla (the company behind the open source Firefox browser). It works by showing that the sites you visited and what tracking devices can be attached to the system.