About Twitter : Twitter is considered as most popular micro blogging website in all over the world. It is a free service that facilitates its users to send and read messages known as tweets. Tweets are text-based posts of up to 140 characters displayed on the author’s profile page and distributed to the author’s subscribers who are recognized as followers. Senders can restrict delivery to those in their circle of friends or, by default, allow open access. Users can send and receive tweets via the Twitter website, Short Message Service (SMS), External applications, Firefox Add-ons. Here I have listed most popular ten Firefox add-ons which are powerful enough to boost up your twitter experience.

1)Twitter Search :

This Firefox search plug-in gives you quick access to the real-time Twitter search. It adds an option for Twitter Search into the search bar. This is quite useful if you search frequently on twitter about latest trend topics or hash [#] tags. Instead of going on search.twitter.com you can simply search using this simple add-on.
Link: Download Addon.

2)Power Twitter :

This add-on adds various features like Twitter Search, status histories when hovering, a Facebook status stream, inline embedded media, and URL expansion to Twitter’s web interface. If there’s a link to a YouTube video, Flickr photo, or Google Map, Power Twitter will automatically embed that media inline with the rest of the content on that page. It will also expand shortened URLs and display the returned page’s title, which isn’t quite so helpful as if it left the short URL and allowed you to expand it on command (like Twitter Search does).
Link : Download Addon.

3)TwitterFox :

This extension keeps you updated about latest tweets of your friends and also allows you to update your twitter in few clicks.TwitterFox adds a tiny blue twitter icon on the status bar that notifies you when your friends update their status you can select time interval for checking for updates. Also it has two other tabs called “Mentions” and “Messeges”,in mentions you can see tweets in which you are mentions and in messages contains all the direct messages you have received.
Link : Download Addon.

4)TwitterBar :

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 can also post by typing “–post” at the end of your tweet. Clicking the Twitter icon when visiting a webpage will send a tweet containing the URL of the webpage you are currently viewing.
Link : Download Addon.

5)TwitKit :

TwitKit is a Twitter sidebar for Firefox. TwitKit has a 6-section interface, using tabs to separate content. You can view the Twitter public timeline,your user timeline, a list of your friends and their latest tweets, a list of your followers and their latest tweets, @replies made to you, and stats about your account.Many different color schemes and settings are available for configuration, to suit any preference of appearance.
Link : Download Addon.

6)TwittyTunes :

Allows to post your currently playing songs to Twitter with a click. As a bonus, you can also post the websites you’re visiting, videos you’re watching and more!
Link : Download Addon.

7)Twitzer :

Twitzer is a Firefox extension which lets you post text longer than 140 characters on Twitter.com. It also provides a feature where you can resolve all TinyURL links to actual links so that you are sure you are clicking on safe links.
Link : Download Addon.