No data is collected nor stored by the author. Some information including origin IP address and add-on extension HTTP request headers are required to be transmitted to remote API/Git endpoints in order to poll for release updates. These endpoints include:

Firefox: "https://product-details.mozilla.org/1.0/firefox_versions.json"
LibreWolf: "https://gitlab.com/api/v4/projects/44042130/releases.json"
IceCat: "https://gitweb.git.savannah.gnu.org/gitweb/?p=gnuzilla.git;a=atom"

The author cannot be held liable for the data collection policy instituted by the server administrators of the aforementioned addresses. Privacy and security are highly valued and important to the author. This extension will always remain transparent and open-source.