nothing is collected or sent whatsoever. The addon modifies requests to various pages to enable their built-in safe search mode, and stores cookies to this effect to duckduckgo, brave search, and vimeo, but only this modification happens, no other changes are performed.

(this is in effect no privacy policy, because NO DATA IS COLLECTED, but Firefox reviewers have requested a policy)

For duckduckgo, brave search, and vimeo, cookies are added that ONLY ENABLE SAFE SEARCH. (similarly, adult cookies are removed for several sites). See https://github.com/serv-inc/safe-search/blob/master/addon/background.js#L149 for exact details of the cookies. These are the same for everyone, so they also CONTAIN NO PERSONAL DATA WHATSOEVER .

If you have any questions, feel welcome to raise a github or gitlab issue pr pull request.