Firefox and Internet Explorer only: The Surf Canyon browser extension embeds extra search results at Google, Yahoo, and MSN. With Surf Canyon installed, search the web with your favourite engine as usual. A bull's-eye icon will appear next to results—click it to expand another level of links related to the single result. My test for a "lifehacker" Google search was promising: Surf Canyon included links to the official Lifehacker book, Upgrade Your Life, and a life hacks site search engine at Google Coop. Surf Canyon is a free download, and it's available as both a Firefox extension and IE add-on.