Firefox3 compatible version available at http://www.binaryturf.com/free-software/cutemenus2-for-firefox/
A simply breathtaking essential that iconifies your menus with beautiful icons and also has an amazing XP skin. Multiple locales supported including (en-US), (it-IT), (ru-RU), (de-DE), (fr-FR) and (pl-PL), and more.
In the words of rue "CuteMenus is configurable, and has a number of iconpacks available."( While holding down the shift key, right click on the current page to bring up the context menu and move the mouse with the shift key still pressed. See More previews on the right.) Uses themes by Aaron Spuler (http://www.spuler.us) and rue.
Credit for localization goes to OzYrYs pl-PL, Gabriele Tittonel it-IT, Dmitry Gorsky ru-RU, Joshua Luedke de-DE, Le Ber Mathieu fr-FR, Dan Mirescu ro-RO. Credit for programming support goes to Philip Chee (Mozilla Implementation), Aaron Spuler (Themes), rue, Georgi Avramov, Bradley Chapman, Shelumi'El Jordan.