$heriff_v2 is an experimental service developed by Costas Iordanou that aims to uncover traces of price discrimination on the internet. This Chrome add-on allows users to search for dynamic price variations based on various factors such as location, browser/OS, incoming links, and navigation history.

To use $heriff_v2, users are encouraged to enable cookie and browser history donation from the options menu. By default, the add-on does not collect any information from the user's browser. When donation is enabled, $heriff_v2 only collects cookies from the selected website and third-party domains. It does not collect session cookies or personal data.