Up & Coming Extensions
Adds options to launch other profiles.
Allows to modify the header and the source of messages
Checks all installed add-ons for compatibility with Thunderbird 91 (next ESR) and displays status information on a button in the main toolbar. This button will open a detailed overview, including links to alternatives for abandoned add-ons.
This provider add-on adds Google synchronization capabilities to TbSync. Only contacts and contact groups are currently managed, using Google's People API.
Please read the "About this Add-on" section below carefully!
gContactSync Requires Restart
Synchronizes contacts & groups between Thunderbird and Google Contacts.
FileLink provider for WebDAV Featured
Uploads your large attachments to your WebDAV account instead of sending them by email.
Export your mails and folders to a zip file!
Upload large attachments to your Cloud and send the link by email
Calendar Tweaks Requires Restart
Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.
This extension will minimize Thunderbird on startup, it is very simple and I didn't put much work into it but it should work on all platforms. Please let me know if you want more features added into it.
Dark mode for every email. Take care of your eyes, use dark theme for night and daily messaging.
LightningButton Requires Restart
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
Adds calendars containing the birthdays from your address books.
ThunderPEC Requires Restart
ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.
This extension is an extension to Mozilla Lightning for Thunderbird.
It shows a toast message and opens the invitations window when an invitation arrives.
Adds a Restart Button, restarts Thunderbird
Follow up for Thunderbird E-Mails.
Beautifully visualized statistics for your Thunderbird Email Accounts
Sets the spell check dictionary based on the first recipient