Earlier we had seen Microsoft teaming up with Mozilla to bring Firefox with Bing, there’s Firefox with twitter also. Using this version you can Search for people and topics on Twitter, directly from the Firefox Address Bar using @ and # . Thus it takes directly to the user’s profile page or to a Twitter search result for username, hashtags respectively. Also you can search for any keyword on Twitter through the Search Bar by selecting Twitter in the drop-down.
You can get Firefox with Twitter from - http://firefox.twitter.com/