Up & Coming Extensions
Limits displayed headers to 1 or 2 lines.
Put an unread mail count badge on the Thunderbird icon in the Windows taskbar.
Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).
Sets the spell check dictionary based on the first recipient
Lets you associate user accounts and identities with specific folders. Great for multiple users who share TB, or for managing mailing lists.
Make your photos smaller, so they don't take forever to email.
Phoenity icons for Thunderbird
Displays a small graphic visualising the context (thread) of the currently selected email.
Outlook style headers and few goodies for Thunderbird.
Upload large attachments to your Cloud and send the link by email
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.
Adds some toolbar buttons using phoenity icons.
Displays message headers more compact (2 lines).
Adds a button to open Google Calendar in a new Tab
Custom Address Sidebar Requires Restart
Allow you to help address sidebar more useful.
This Addon is needed to sync your Android based smartphone with Thunderbird with the Software "MyPhoneExplorer"
FileLink provider for WebDAV Featured
Uploads your large attachments to your WebDAV account instead of sending them by email.
Reinstates the extensions.checkCompatibility preference without respect to the current application version.
Causes Thunderbird's main window to minimize instead of closing. You can still close Thunderbird through the menu.
Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
This module allows you to change/edit email subjects