Useful Firefox Addons

(I've seen a number of useful addons mentioned periodically at the Lifehacker blog (lifehacker.com) --Rhansen 01:37, 29 November 2007 (EST) )
 * del.icio.us toolar and tag button (from Yahoo) for handling bookmarks
 * It's all text - allowing the use of your own editor for text-boxes on web forms
 * Read it later - Helps you avoid wasting time on the reading an interesting looking headline (on popurls) right away. Instead ... save it for later.
 * Screengrab!
 * TinyURL
 * Chatzilla  - IRC client