Add-ons
Thunderbird DE/EN/FA Collection
by Arash S.
About this Collection
A Collection of my Favorite Add-Ons, used in Thunderbird 3.xx+, on both Windows and Linux versions.
35 Add-ons in this Collection
Provider for Google Calendar
by Philipp Kewisch
197,937 users
Allows bidirectional access to Google Calendar
Enigmail
by Patrick Brunschwig
4,912 users
Helper tool to migrate your keys and important settings from Enigmail to Thunderbird 78.
German Dictionary
by KaiRo
241,408 users
German Dictionary (new Orthography) for spellchecking in Mozilla products
Manually sort folders
by Jonathan Protzenko, Itagaki Fumihiko
16,540 users
This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.
MinimizeToTray revived
Signature Switch
by Achim Seufert
49,581 users
Switch the signature on/off or choose a new one from your predefined set.
CompactHeader
by jmozmoz
17,227 users
Add symbol in header plane to switch between compact and expanded view. Work only for Thunderbird 68.0 and older. Currently, there are no plans to update this for newer versions.
FireTray
by Foudil, Francesco S., others
1,144 users
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 ...
ReminderFox
by Tom Mutdosch, Daniel Lee, others
3,147 users
ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.
Stationery
by Arivald
1,200 users
Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!
Silvermel
LightningButton
by rsjtdrjgfuzkfg
3,564 users
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
Notepad (QuickFox)
United States English Spellchecker
by jooliaan
5,366 users
This dictionary is no longer maintained. Use this dictionary instead.
Remove Duplicate Messages
by Thorsten W. Schmidt
275 users
If you have duplicate messages (e.g. from merging folders or downloading messages several times) you can use this tool to find and remove them from the selected folder and its subfolder by rightclicking on a folder and choosing "Remove duplicates..."
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