Chrometana is an extension for Chrome that allows you to change the search engine used by Cortana on Windows 10. With it is possible to redirect the search engine to Google, Yahoo or DuckDuckGo.
For being a Microsoft product, Bing is responsible for providing the results of the research done on Cortana.
Although change the search engine, with the Chrometana the user can no longer see the preview of the links, being forwarded directly to the results page of the chosen site.
Free Download: Chrometana for PC