Autocomplete Manager provides advanced features for the address Autocomplete component in Firefox.

A set of tools, including a comprehensive statusbar button and right-click menu to enable convenient posting or voting for links.

Toolbar for students of the Spanish language. Includes word definition search, entry of special characters, and links to native Spanish websites.

Hides 'Bookmark Menu' and 'Bookmark Toolbar' from the bookmark sidebar, allows you to arrange your bookmark structure however you like (like in FF2), and frees space in the sidebar.

With the bit.ly Preview Plugin for Firefox, whenever you hover over a bit.ly URL on any web page, we display a tooltip showing the Page Title, Long URL, and any Click Data we have about the page the URL links to. If you hover over another short URL, http://tinyurl.com/5qhkwo, for example, we show the Page Title and Long URL for these links as well. Plus, we check to see if anyone made a bit.ly link pointing to the same place, and, if so, we show how many clicks it has received. All this info should help you decide if a link is worth checking out or not.