Useful Essentials

Chatzilla for IRC

FireBug for Javascript Editing

FireFTP for FTP client

FireTorrent for BT torrent

GreaseMonkeys for js hacks

Style for styling hacks

Interesting Ones

Homepage Randomizer

Firefox Google Bookmarks

http://foxmarks.com/

DownThemAll!

ClipItMore

Uploader -Fireuploader

Interesting Fields

Timers

Dictionary See http://blog.plasticmind.com/0s-and-1s/using_firefox_as_a_dictionary.php, http://www.answers.com/main/firefox_plugins.jsp, http://www.dailyblogtips.com/dictionary-extensions-for-firefox/, http://www.rjonna.com/ext/dictionarytip/index.php

Downloaders

Session Saver

Styles

Skins

Bookmarklets