The entire page will be fading to dark, so you can watch the video as if you were in the cinema.
MeasureIt Requires Restart
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Shut down the lights on YouTube.
Forecastfox (fix version) Requires Restart Featured
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Now Available for: Firefox, Thunderbird and SeaMonkey!
New Tab Tools Featured
Customizes the new tab page. Add more tiles. Add the launcher from Firefox start. Have a background image. Set new tile images and titles. See recently closed tabs. And more...
Zoom Page Requires Restart
Full featured zoom manager with independent page and image zoom modes. Choose from four zoom modes: Default Zoom, Fit-To-Width, Default Zoom + Site Specific or Fit-To-Width + Site Specific. Button style and zoom levels are fully configurable.
Webmail Ad Blocker Featured
Expand your email area by blocking and removing ads on the right hand side of the screen when using Gmail, Hotmail, Outlook.com and Yahoo Mail.
Makes a Printer Friendly & PDF version of any webpage. Removes navigation, ads, and junk. Formats the page for print so you save paper and ink. Good for the environment and your wallet.
Block/Allow images by pressing user-defined hotkeys or a toggle button.
Force YouTube to use Flash player over the HTML5 player
Menu Wizard Requires Restart Featured
Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey
Simple Locale Switcher Requires Restart
An easier management of the user interface language
Short, Vim-style keyboard shortcuts for browsing and navigation, for a near mouseless experience.
Gives you a place to put all your add-on buttons without over-crowding the navigation bar.
Status-4-Evar Requires Restart
Status bar widgets and progress indicators for Firefox 4+
MyKey Interface Requires Restart
Interface between Firefox and MyKey.
Classic Toolbar Buttons Featured
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions.
Beta builds on versions page!
Vimperator Requires Restart
Make Firefox look and behave like Vim