Here's some input from Jim Hays, "In a recent posting David Passell mentioned using "duck duck go" to ensure search privacy. Another option is Startpage (https://startpage.com/) which claims to be 'the only third-party certified search engine in the world that does not record your IP address or track your searches.'
"StartPage is compatible with a broad range of browsers including Firefox, Safari and Chrome. StartPage can also be used to visit third-party websites with total privacy by using the StartPage Proxy."