While playing with Firefox I got annoyed that Ghostery finds trackers on this website. One of them is Google. I used Google Custom Search to allow visitors to find something in the entire network (there are different sites which only allow searching ‘themselves’). Looking for a replacement I found the DuckDuckGo option. No plugin needed, no results page to add and a somewhat customizable result page at DuckDuckGo.
DuckDuckGo is not my favourite search engine, but it is one of the private search engines, so I have killed another tracker.