
The extension "searchrefinements" for the Chrome Extension Web Store has a feature that lets users request websites that are not yet supported by this extension. In order for users to not keep on resubmitting requests for the same website and therefore only allowing for one unique vote per user and website, this extension needs to know what users makes what requests.
searchrefinements requests a "identity.email" permission, but it does not store or use the user's email address. It requests said permission to receive the user's id. This id is send to the backend and stored in a database along with the requested website.
No user data will be shared with any other party. The user's id is only stored in the backend's database to guarantee the uniqueness of the requests.