Twitter Address Bar Search - Firefox Addon - This restartless add-on lets you use Twitter to search for #hashtag and @username from the address bar in Firefox on the desktop and on Android!
Instantly connect: Search people and topics on Twitter using @ and # from the address bar.
Stay informed and updated: The pinned Twitter App tab lights up when new Tweets arrive
Twitter Filter is the only way to hide updates based on their source (e.g., foursquare, gowalla, TwitterFeed). To hide updates from a source, just click the "(X)" next to that source's name underneath a tweet.
To see the sources you have already blocked (and to unblock any of them), take a look at the bottom of the Twitter sidebar
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
Txt Msg Linux provides acronyms and abbreviations used when text messaging via email, chat, IM, and sms.The data included from Txt Msg can be included in spell checker programs to make this processor faster in email programs. This is an ideal add on for users of small keyboard devices such as Palm OS
U-Bahn Navigator helps you navigating through foreign public transport networks. It finds the shortest or direct route from a start to a destination station of the loaded subway map. U-Bahn Navigator is extensible to support each public transport network
UC Berkeley Library Search (University of California Berkeley) - Firefox Addon - Search the full catalog by title, author, subject, keyword etc.
The University of California, Berkeley's 32 constituent and affiliated libraries together make it the fourth largest academic library in the United States, surpassed only by the Library of Congress, Harvard, and Yale
