Menu Wizard Requires Restart
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
Google Hangouts Web Messenger brings Google Hangouts right into your browser to chat with your friends.
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.
RC Print Requires Restart
Adds a "Print" option to the Right-Click context menu.
Add-on for Firefox and Thunderbird. Replaces built-in notifications with the OS native notifications. It supports most Linux Desktop Environments, Windows 8.1 & 10.
jQuery Requires Restart
jQuery and jQuery UI embedded in browser
Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.
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.)
Simple Locale Switcher Requires Restart
An easier management of the user interface language
Select link text with easy mouse gestures.
FireTray Requires Restart
A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...
Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks
FolderFlags Requires Restart
Allows users to edit the flags Thunderbird sets on folders.
Enhanced Priority Display Requires Restart
Enhanced thread pane display of message priorities.
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.
A button to be able to open the profile folder, along with two buttons to create profiles, and also switch the current profile.
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
SeaTab-X-2 Requires Restart
Adds Firefox-style tab closers into SeaMonkey.
Adds icons to buttons and/or menus.