DuckDuckGo, a privacy focused web browser, has come under fire for allowing Microsoft trackers on third-party sites as part of their syndicated search content contract with the company.
The search engine takes pride in not tracking user searches or behaviour, and not building user profiles to display targeting advertising, instead using contextual advertisements from their partners.
While DuckDuckGo does not store personal identifiers, Microsoft advertising can track your IP address, among other information, when clicking you click on an ad link.