Firefox rocks because it acts like a Lego set -- you have your base module, and then you can stick extensions on it. Some of the most obvious extensions are toolbars. Unlike the embedded-application extensions like Chatzilla or FireFTP, toolbars actually modify your interface. A toolbar can contain search engine interfaces, bookmarks, RSS feeds, or extra tools for managing content. A lot of toolbars are very specialized -- tools for multimedia producers, musicians, and even Mormon theology students. Here are three more general toolbars that any net junkie will find useful.