- Purebrowser could use DuckDuckGo (not Yahoo or Google) as default search engine. (As of 2019, Purebrowser defaults to DDG)
- In the future, Purebrowser could use another centralized but more ethical service (when available), or a decentralized tool like yazy (when packaged in Debian).
DuckDuckGo (DDG) apparently uses non-Free Software to "track" users and/or "fingerprint" users. What DDG says: https://techcrunch.com/2019/01/07/duckduckgo-browser-fingerprinting/
If our default search engine tracks users, perhaps we ought to move to a new search engine that doesn't track users.