Switch tabs by scrolling with the mouse wheel in the tab bar.
Dorando keyconfig Requires Restart
A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)
Manage your installed personas (lightweight themes).
Right Links Requires Restart
This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.
Custom Buttons Requires Restart
Gives a possibility to create custom toolbarbuttons...
The Add-ons Manager slims down!
This add-on reduces the height of entries in the Add-on Manager, so you can display more of them at a time.
YouTube Video Player Pop Out lets you pop out YouTube videos so that you can watch YouTube videos while you surf.
Restores the default image style used for top-level images in previous versions of Firefox.
Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks
Duplicate This Tab Requires Restart
This add-on provides the much needed feature update of Tab Duplication to Mozilla Browsers. Features Supported include Duplication of Browser Tabs, Detaching Tabs and Merging All Windows.
Adds icons to buttons and/or menus.
Google Hangouts Web Messenger brings Google Hangouts right into your browser to chat with your friends.
Open With Internet Explorer sends pages from Mozilla Firefox to Internet Explorer.
See more search results etc. on one page, concatenating several pages together...
Compact Menu 2 Requires Restart
Add a compact menu button to the navigation toolbar, and hide the menu bar.
Sync engine for Stylish with backup / restore facility.
KeePass Helper Requires Restart
Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.
FolderFlags Requires Restart
Allows users to edit the flags Thunderbird sets on folders.
Active Stop Button Requires Restart
Stop gif animation with button, context menu or Esc key
This extension enables true full screen mode in SeaMonkey for HTML5 video players, slide-shows, etc. and also for full screen invoked manually with the F11 key.