Add-ons
Up & Coming Extensions
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Requires Restart
Adds a column type named "#" that displays row numbers in a message list. Sorting by this column does nothing.
Custom Buttons²
Requires Restart
The Custom Buttons² Firefox extension provides the code base support necessary to create, maintain, import, and export custom toolbar buttons. The buttons can perform just about any task, with a large number of buttons already available on the exte...
Toggle Address Box
Adds a Address Box button, toggles the Address Box in the Composer window
Scriptable Notifications
Allows you to define an external script (bash, batch, python, ...) which is called so you can manage mail notifications / alerts the way you want.
Snap/Flatpak versions of Thunderbird not supported.
Safelinks Cleanup
Cleans up Outlook’s “safelinks” tracking.
Minimal code to allow for easy auditing of the add-on. The only code is:
https://github.com/Cimbali/safelinks-cleanup/blob/main/src/background.js
Attachemnt Encoding Detector
Requires Restart
To detect file encoding of attachments, this forces to Thunderbird to use an encoding detector for a specific locale instead of the generic one.
TuLPe
Traffic light protocol extension for Thunderbird, messages are customizable in the option page.
Reply to Multiple Messages
Requires Restart
Add menu commands for replying to multiple messages at the same time.
Eortologio - Greek Namedays Calendar (Thunderbird)
Requires Restart
This extension consists of a Greek Orthodox Namedays reminder. It displays in Thunderbird status bar current day's celebrated names.
Flat Folder Tree (updated)
Flat Folder Tree enables you to selectively breakout sub-folders under intermediate folders in the folder pane view. This is an updated version of the existing addon, now compatible with Thunderbird 60.
Thunderbird Biff
Requires Restart
This add-on provides a visual indicator of new Thunderbird mail availability in supported clients (Firefox, Sunbird) and Thunderbird itself. Note: you MUST install this add-on in BOTH Thunderbird and supported clients as there are both client AND ser...
PGPGeek
Quick & easy PGP encryption / decryption tool
* Save & use many public encryption keys to encrypt mail content
* Save & use many private decryption keys to decrypt mail content
Using openPGP.js
Open Source
https://github.com/pgpgeek/pgpgeek
OpenPGP Alias Updater
Updates the local OpenPGP Alias file from a server to simplify encryption for mailing lists, or email aliases in an organizational environment.
Please make sure config parameter "mail.openpgp.alias_rules_file" is set to "openpgp_alias.json".
Open Addons
Thunderbird Chat Notification
Requires Restart
Chat notification for Mozilla Thunderbird. Notification with alert (click on alert open conversation) and sound.
TeamBox-ff
Requires Restart
Ce module permet de passer des appels téléphoniques en cliquant sur les numéros de n'importe quelle page web, via les serveurs voip TeamBox et Asterisk
Advanced Composer
Creates quote header in Ms Outlook style, message templates, signatures, message recipient groups, and more.
Gif Remover
KDE Wallet password integration
Requires Restart
This is an extension that allows firefox use kde's kwallet password manager to store passwords.
pasteCode
Requires Restart
Programmers: want to email some source code to a colleague and have it be actually readable and highlighted just like in your code editor? Well with pasteCode, you can do just that...
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