Twitter Firefox Extensions

Twitbin | Twitter Firefox Add-On | Twitter Sidebar
TwitBin is a Firefox extension that allows you to keep up with all of your Twitter conversations directly from your browser’s sidebar. Send and receive messages, share links and more.
TwitterFox :: Firefox Add-ons
This extension adds a tiny icon to the status bar that notifies you when your friends have updated their Twitter status. It also has a small text input field to allow you to update your own status.
Power Twitter :: Firefox Add-ons
Power Twitter adds a multitude of features to the Twitter website interface.
TwitterBar
TwitterBar allows you to post to Twitter from the Firefox address bar.
shortText.com – Twitzer Firefox extension
This Firefox extension lets you post tweets longer than 140 characters on Twitter.
Twitter Search :: Firefox Add-ons
This plug-in gives you quick access to the real-time Twitter search engine.
Hoopla! – Twitter plugin for Firefox quicksearch
An essential Twitter plug-in for the Firefox quick search feature.
TwitterEyes :: Firefox Add-ons
TwitterEyes keeps track of your character count as you compose tweets and replaces characters if you need extra room.