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ImportExportTools NG

Adds tools to import/export messages and folders

Thunderbird v115 Support Available !

Rated 4 out of 5 stars (213)
264,160 users

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Provider for Google Calendar

Allows bidirectional access to Google Calendar

Rated 3 out of 5 stars (1,649)
199,606 users

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LookOut (fix version)

LookOut decodes winmail.dat (TNEF encoded) files that may come from a misconfigured Microsoft Exchange server or Outlook user allowing access to the original attachments
Support: Thunderbird

Rated 4 out of 5 stars (95)
181,523 users

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Quicktext

Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

Rated 4 out of 5 stars (463)
134,630 users

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Send Later

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (265)
108,585 users

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Remove Duplicate Messages

Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).

Rated 4 out of 5 stars (290)
100,274 users

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TbSync

TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.

Rated 5 out of 5 stars (252)
77,665 users

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CardBook Featured

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon

Rated 4 out of 5 stars (443)
72,400 users

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Mail Merge

Create and Save or Send Multiple Individual and Personalized Messages from a Draft

Rated 5 out of 5 stars (226)
70,484 users

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Grammar and Spell Checker — LanguageTool

Check your emails for spelling and grammar issues

Rated 4 out of 5 stars (30)
62,508 users

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FileLink Provider for Dropbox

Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.

Rated 4 out of 5 stars (21)
53,711 users

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Signature Switch

Switch the signature on/off or choose a new one from your predefined set.

Rated 4 out of 5 stars (272)
50,697 users

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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.

Rated 5 out of 5 stars (54)
49,030 users

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Owl for Exchange

Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).

Rated 5 out of 5 stars (194)
48,002 users

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FileLink provider for WebDAV Featured

Uploads your large attachments to your WebDAV account instead of sending them by email.

Rated 3 out of 5 stars (21)
46,387 users

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Web Translate

The best Translator for Thunderbird!

Supported translators:
Google Translate
Microsoft Translator
DeepL
Yandex
Яндекс Переводчик
Google 翻译
百度翻译

Rated 4 out of 5 stars (24)
44,990 users

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FileLink provider for Send

Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).

Rated 5 out of 5 stars (16)
43,625 users

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Minimize on Close

Causes Thunderbird's main window to minimize instead of closing. You can still close Thunderbird through the menu.

Rated 4 out of 5 stars (81)
39,366 users

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Textmarker

Highlights selected text when composing emails. Default colour is yellow - other colours are available via Options.
(Works only during writing an e-mail, i.e. only in the compose window.)

Rated 5 out of 5 stars (31)
37,964 users

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Provider for Exchange ActiveSync

Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync

Rated 4 out of 5 stars (56)
34,611 users

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