Here is list of some add-ons of Firefox which one can use for twitter –
1. Yoono – It Get all your updates, share across Face book, LinkedIn and at other social networking sites all at once
2. TwitterBar – One can post to Twitter from the address bar
3. Power Twitter
4. Echofon for Twitter
5. Twitbin – It is a Firefox extension that allows one to keep up with his or her Twitter conversations right from the browser sidebar.
6. Twitter Search
7. Tiny Tweet – It tweets any text, one has to simply highlighting it.