For all those who use twitter regularly and updates their status time to time here is a great Firefox Addon from which you could post tweets to your account right from your firefox’s address bar.
After installing TwitterBar on your Firefox you will be able to update.??TwitterBar allows you to post to Twitter from Firefox’s address bar. A small Twitter icon sits to the right of your address bar; clicking on it will post your tweet, and you can hover your mouse over it to see how many characters you have left.
You may use following link to download this Addon :-