This add-on does not collect personally identifiable information, such as IP addresses of users. However, it tracks installing and uninstalling by opening a support page that contains Google Analytics. Google Analytics collects some non-personal information such as browser type, operating systems, etc. Terms of service for Google Analytics can be found here: https://www.google.com/analytics/terms/us.html

When you enable this add-on, your browser's traffic route through the Tor network. According to the tor-project website, Tor bounces your communications around a distributed network of relays run by volunteers around the world. In order to get more info about tor-project and its privacy, please read this page: https://www.torproject.org/about/overview.html.en