BetterSearch ia an extension for Firefox which enhances a range of different search engines. It improves Google (all international flavours, too), MSN Search, Yahoo Search, del.
icio. us, A9, Answers. com (web results), AllTheWeb, ask. com (Ask Jeeves), Clusty. com, Vivisimo. com and Simpy. com by adding previews (thumbnails) and Amazon product images and info (type, price, rating for US/DE/UK/CA/FR products), a quick preview feature as well as "Open in New Window", "Site Info" and "Wayback Machine" links to the search results.