Up & Coming Extensions
Lightning Colors Reminder Requires Restart
Let's show the calendar color on Lightning reminders!
EditEmailSubject (Edit email Subject) Requires Restart
This module allows you to change/edit email subjects
Upload large attachments to your Cloud and send the link by email
Edit Email Subject Requires Restart
Edit Email Subject for Thunderbird
DeepDark for Thunderbird Requires Restart
Dark mode for Thunderbird UI
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
Lightbird Requires Restart
Standalone calendar UI for Lightning
Uploads your large attachments to your WebDAV account instead of sending them by email.
Remove Duplicates Requires Restart
Removes duplicate messages
Reinstates the extensions.checkCompatibility preference without respect to the current application version.
Uploads your large attachments to your Box instead of sending them by email.
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.
Auto Address Cleaner T Requires Restart
Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
Display Mail User Agent T Requires Restart
Displays the mail program with which the selected mail was written
*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.
Minimize on Close Requires Restart
Causes Thunderbird's main window to minimize instead of closing. You can still close Thunderbird through the menu.
Phoenity Icons Requires Restart
Phoenity icons for Thunderbird
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
Get All Mail Button Requires Restart
Adds a toolbar button to Get All Mail Accounts in Thunderbird.
Signal Spam Requires Restart
Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).
Zombie Keys (Multilanguage Keyboard) Requires Restart Featured
Enter accents, diacritics, diaeresis, umlauts, ligatures etc. with keyboards of various countries (us,uk,ie,fr,it,ru,de,sv) - via easy to remember shortcuts or menu. Also supports all textboxes of the application (such as search, filters).