Privacy Policy for PrivacyMeter

PrivacyMeter is a non-commercial research tool developed by PragSec Lab at Stony Brook University. It is a free browser extension available in Chrome Store. This page is used to inform website visitors about our policies with the collection, use, and disclosure of Sensitive and Personal Information if anyone decides to use PrivacyMeter. If you choose to use PrivacyMeter, then you agree to the collection and use of information in relation with this policy. The Sensitive or Personal Information that we collect are solely used for providing and improving the service, and for pure academic research of the aggregated privacy trends. We will not use or share your information with any third-party.

Information Collection and Use

No personally identifiable information will be collected while using PrivacyMeter! There are only two scenarios when we might collect sensitive information for the functionality of the service:
  1. For a better experience while using PrivacyMeter, we have to cache on the back-end servers the information about web trackers (the domain parts of their URLs), which are encountered on web pages that users visit. At the same time, we do not store any information about actually visited websites or any links to a particular PrivacyMeter's user.

  2. If user opts in "crowdsourcing" option (by selecting the appropriate checkbox on the PrivacyMeter's settings page), the extension reports to its backend the following privacy practices per web page: list of present trackers (their URLs), fingerprinting APIs called (and their counts), list of third-party iframes (their URLs), and the list of leaky web forms (their URLs). We store this information solely for updating the baselines in order to provide accurate comparison of the privacy practices, and for pure academic purposes in order to investigate only aggregated privacy trends. Again, neither links to particular users, nor the actually visited URLs will be reported or saved.

Server Logging

We want to inform you that whenever you use PrivacyMeter, it may communicate to our backend servers (to update the baselines, to request information about web trackers, or to send a crowdsourcing report). In either of those cases we may save request logs, which contain your Internet Protocol ("IP") address. We will not use or share this information with any third-party, and will not use it for anything except collecting aggregated general statistics.


We value your trust in providing us your Sensitive and Personal Information, thus we are striving to use appropriate means of protecting it. In particular, all the communications between the extension and the back-end servers are done via secure HTTPS protocol.

Changes to This Privacy Policy

We may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. We will notify you of any changes by posting the new Privacy Policy on this page. These changes are effective immediately, after they are posted on this page.

Contact Us

If you have any questions or suggestions about PrivacyMeter's Privacy Policy, do not hesitate to contact us at PragSec Lab.