The "sequere.eu - Social networks" plugin enables a search in many social networks at once.
The sequere.eu search engine enables an Easy, one-click search within many subjects and geopolitical regions. Search in Directories - the information you may trust more. Search for Music and Videos. Search for scientific information, software ..
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
ScribeFire Mobile - A full featured blog editor that integrates with Mobile Firefox and lets you easily post to your blog.
Note: Due to a bug in Mobile Firefox, you may occasionally notice that ScribeFire does not load after clicking the toolbar button. If that happens, just click the button again
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
Facebook Translate - Firefox Addon So you got friends around the world, and stay in contact via Facebook? But they won't update their statuses in English?
This Firefox add-on lets you translate status updates and comments on Facebook with a single click.
To select language: Tools > Add-ons > Facebook Translate > Preferences
Uses the Google Translation API
Facebook Search without logging in! Search Facebook Messages, People, Applications, Video, Music, Groups etc. For more it allows one to search for specific texts on the walls of Facebook subscribers en masse
ScribeFire Next - Firefox Addon - This is a redesign of ScribeFire, one of the most popular add-ons for Firefox. ScribeFire is a full-featured blog editor that integrates with your browser and lets you easily post to all of your blogs
Twitglee - Search Twitter & Google!! -- Search Twitter and Google together. Compare results simultaneously. Get Real Time as well as General Google results.
What's New in This Release:
· Better Suggestions (uses Google Suggest)