Customize Firefox look, add useful graphical tools for a better GUI experience. See also 'For Visual Appearance' by smayer97.
Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.
Reloads web pages every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (right click on the tab)
Show tabs like a tree.
Collector's Note It's much easier to keep up through your surfing when you can see the logic between all these opened tabs!
Status bar widgets and progress indicators for Firefox 4+
This extension allows you to execute common commands using mouse gestures, rocker navigation, scroll wheel navigation and page...
Integrates location bar and search bar into one. Shows search and url suggestions. Quickly switch search engine using search keywords. Provides different auto-complete popup styles for compact displays.
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).
Adds an about:addons-memory page that details add-on memory usage
Provides feature to close multiple tabs.
Collector's Note "Superb add-on for anyone who is used to opening many tabs in a single session. Use with Tree Style Tabs and you'll be hooked. Then you can close off Trees."
A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)