DuckDuckGo links to Abine on their "Don't Track Us" site:http://donttrack.us/
(scroll down to recommended addons)
Abine's Protected Search looks interesting, but it adds some lag with a proxy.
The Protected Search system consists of a custom proxy and a Firefox Addon. The proxy works by generating a pool of Protected Search "identities," each of which contains a cookie issued by Google and an arbitrary User-Agent for one of several popular browsers. The Firefox Addon watches for requests to Google services from your browser, and when enabled will transparently redirect all of them (except for things like Gmail) to a Protected Search proxy. There your request is stripped of all identifying information and replaced with the information from a Protected Search identity.
I still feel a little safer using Startpage, but Abine's approach could be useful for those that need the interface of the big G.Update
Just installed Abine Protected Search and it looks like Abine just piggybacks off of GoogleSharing.net's proxy.
Might as well install that addon instead:https://addons.mozilla.org/en-US/firefox/addon/60333/