Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
Element Hiding Helper for Adblock Plus No Restart
Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.
Download Status Bar No Restart
If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.
Adds some tools to import and export folders and messages
Manage any SQLite database on your computer.
Allows bidirectional access to Google Calendar
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Switch the signature on/off or choose a new one from your predefined set...
Diagnostics for Adblock Plus No Restart
Diagnostics tool for Adblock Plus, provides some insight into internal processes of Adblock Plus.
Minimizes windows into the system tray.
UnMHT No Restart
UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
Add more items to Add-ons Manager context menu.
"Restart" menu and button, with configurable shortcut key.
Classic Toolbar Buttons No Restart
'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 on Windows.
Beta builds on versions page!
FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
A simple note-taking extension.
Toolbar Buttons No Restart
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.
Copies text without formatting
FoxClocks No Restart
FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.