Add-ons
Most Popular Extensions
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Provider for Google Calendar
Manually sort folders
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.
ImportExportTools NG
Adds tools to import/export messages and folders (NextGen)
NEW 78/68 Compatible version !
See Changes below
LookOut (fix version)
LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Support: Thunderbird
Quicktext
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Remove Duplicate Messages
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
Enigmail
TbSync
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.
CardBook
Featured
A new Thunderbird address book based on the CardDAV and vCard standards.
Twitter: @CardBookAddon
Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Send Later
Provider for CalDAV & CardDAV
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, ownCloud, Nextcloud, Radicale and many more.
Signature Switch
Switch the signature on/off or choose a new one from your predefined set.
Owl for Exchange
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
ImportExportTools
Requires Restart
Adds some tools to import and export folders and messages
Confirm-Address
Thunderbird Conversations
Featured
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.
Provider for Exchange ActiveSync
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync
Open Google Calendar
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
FileLink Provider for Dropbox
Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.
To create your own collections, you must have a Mozilla Add-ons account.
