Nobody knows the sites you have visited.
Publicly available websites are indexed, triggered by your visit. But your IP address is not stored together with the page in the distributed index. And because the content is encrypted prior to sending, even the receiving index peer can’t reveal your visited sites. So nobody is able to trace you because you are using Faroo.

By the way, there are a lot of intermediate instances and authorities (e.g. your ISP, a lot of peering points …) which are able to trace all your Internet traffic, including the use of normal search engines. So Faroo is not putting you at risk, but instead protecting your privacy at least for search.