$heriff - The price discrimination (PD) add-on.
$heriff is an experimental service that allows to search for traces of price discrimination in the Internet. We want to see whether e-retailers vary their prices dynamically based on the information that they can collect online for the potential customer (such as her location, browser/OS, incoming link, navigation history, etc.).
We encourage the users to enable cookie and browser history donation from the options menu. By default the add-on is not collecting any information from the user's browser. When donation is enable we collect only cookies from the selected website (and third party domains) that the request is send. We don't collect any session cookies or personal data. For more details and news please visit our website: http://sheriff.dynu.com