BetterSearch: An extension for Firefox which enhances Google (all international flavours, too), MSN Search, Yahoo Search, A9, Answers.com (web results), AllTheWeb, del.icio.us 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.

A Firefox Extension For Enhancing Search Engines with some raving testimonials and screenshots for your consumption. If you like BetterSearch, please rate it at Addons.Mozilla.Org! My Question though: Why is Technorati missing?

I’d have to admit — nothing beats Inquisitor on Safari though. Live, predictive search extension for safari ~ visit developers blog. Although you require Mac OS X 10.4 tiger.