Jeff wants to change the default search engine to something other than Yahoo, Bing or Google. He can choose between those three in the Safari preferences, but to use a different one, he'll need to install an extension with a bit of a hack. The Chatroom says plugins like GLIMS will work. There's a Duck Duck Go DDG extension, but Leo advises to be cautious about how he alters his browser settings. That's how exploits happen.