Clusty, the new search engine from Vivisimo, has launched a new toolbar for Mozilla’s Firefox.
What I like about it is the ClustyClip feature that allows you to right-click on a word and open a matching dictionary or Wikipedia entry in a small pop-up window. Doesn’t always seem to work but it’s neat anyway.
An Internet Explorer version of the Clusty toolbar already exists. Firefox of course also offers a range of toolbar extensions that do quite similar things, including the Googlebar (not developed by Google).