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 ...
This extension provides a button for the mail toolbar to get mails for all accounts.
Restart Thunderbird with ease.
“Who else got that mail?”
Baby cats and kittens in the about box...
Introduces an option to specifically set which folder manually marked junk will go to per account.
Visual representation of how spam-like messages are.
Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.
Import and export calendar files in vCalendar (.vcs) format
Add Web Translation Features.
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
This extension allows you to modify the printing output of Mozilla Calendar. You can change the font, font-sizes and display of colors. Plus category colors are actually printed and end date calculation now works!
Official Growl project to integrate it with the Mozilla code base.
Allows bidirectional access to Google Calendar
Quickly get to the latest nightly build of Lightning relevant to the version of Thunderbird and the OS you're on.
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
Add a compact menu button to the navigation toolbar, and hide the menu bar.
Adds an image to the status bar indicating the current threat level of the internet. It allows quick access to security information that you can use to help protect yourself, and links to antivirus software comparisons and security extensions.
Keywordhighlight changes color/size/weight of your favorite keywords...