Yoono While you are surfing, Yoono instantly suggests what others have discovered: websites, people and articles. Create a rich scrapbook of your favourite stuff with the new "Buzz It!" feature, one-click grab and share videos, photos and texts from any web page. Yoono keeps your scrapbook and original Firefox bookmarks synchronised across your computers. http://www.youtube.com/watch?v=AwIzjJrbfq4
Firecookie Firecookie is a an extension for Firebug that makes possible to view and manage cookies in your browser
wmlbrowser Simulate WAP browsing by viewing WML (Wireless Markup Language) pages in Mozilla, SeaMonkey or Mozilla Firefox.
FaviconizeTab This extension adds a new "FaviconizeTab" option to the context menu of the tab. When it is clicked, The width of the tab becomes small up to the size of favicon. It returns to the former size when "FaviconizeTab" is clicked again.
Toolbar Buttons This Extension adds buttons to the Customize Toolbar Window. To move them from there to the Toolbar you must right click the toolbar and press customize select what buttons you want to use and drag them to the toolbar.
Status-bar Scientific Calculator It's a tiny calculator icon in the status bar. Click it, to expand it and use it. Enter the expression to calculate and hit enter to evaluate.
BetterCache Removes anti-cache server response headers, so you will have a better browsing experience using BetterCache.
Save Session With Save Session, you can choose to save the current session and close Firefox for the next startup...
Open Image In New Tab Adds right-click context menu item for opening images in new tabs.
Custom Buttons˛ The Custom Buttons˛ Firefox extension provides the code base support necessary to create, maintain, import, and export custom toolbar buttons. These custom buttons can be written to do various tasks that the user may require.
All-in-One Sidebar All-in-One Sidebar (AiOS) is an award-winning sidebar control, inspired by Opera's. It lets you quickly switch between sidebar panels, view dialog windows such as downloads, extensions, and more in the sidebar, or view source or websites in the sidebar.
Flagfox Displays a country flag in the status bar depicting the location of the current website's server, and provides quick access to detailed location and webserver information.
The first and only download manager/accelerator built inside Firefox. DownThemAll is all you can desire from a download manager: it features an advanced accelerator that increases speed up to 400% and it allows you to pause and resume downloads at any time!