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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 (347)
72,227 users
Updated June 21, 2021

ConfirmConversionsAtSelecting

Confirm conversions of e-mail to event and task at selecting thread tree children.

Glory be to God!

Not yet rated
3 users
Updated June 21, 2021

HERA - Test Demo

HERA helps hotels to semi or fully automatically respond to emails by checking rates in your PMS / CRS

Not yet rated
0 users
Updated June 20, 2021

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.

Rated 4 out of 5 stars (489)
28,723 users
Updated June 18, 2021

SmartTemplates Featured

SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.

Rated 5 out of 5 stars (72)
8,661 users
Updated June 17, 2021

List Addons in Windows' Programs

List addons in Windows' "Add or Remove Programs".

Rated 5 out of 5 stars (1)
1,580 users
Updated June 17, 2021

Charset Menu

Restores the charset menu removed in Thunderbird 91 and fixes an issue in Thunderbird 78.

Not yet rated
17 users
Updated June 17, 2021

Dictionary for recipient

Sets the spell check dictionary based on the first recipient

Rated 4 out of 5 stars (1)
3,624 users
Updated June 17, 2021

Sender Frequency

Adds a custom column for Sender Frequency to the thread pane

Rated 4 out of 5 stars (5)
356 users
Updated June 17, 2021

Display Mail User Agent T Featured

Displays the mail program with which the selected mail was written

*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.

Rated 5 out of 5 stars (14)
8,050 users
Updated June 17, 2021

Addressbooks Synchronizer

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

Rated 4 out of 5 stars (70)
21,948 users
Updated June 16, 2021

Markdown Here Revival

A revival of the popular Markdown-Here addon for Thunderbird 78 and beyond.

Markdown Here Revival is a Thunderbird extension that lets you write emails in Markdown and render them as HTML before sending.

Rated 5 out of 5 stars (7)
577 users
Updated June 16, 2021

GCalTab

GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.

Rated 5 out of 5 stars (7)
1,164 users
Updated June 14, 2021

Manage and archive emails / Nostalgy++ for TB78

Shortcuts to move/copy/archive messages, with folder name completion.
Set rules for moving messages to associated folders.
Automatic rules by statistical observation.
View images inside TB without external viewer.

For v2.3/TB 78.11 see below

Rated 5 out of 5 stars (40)
2,934 users
Updated June 11, 2021

Google-4-TbSync

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!

Rated 4 out of 5 stars (6)
903 users
Updated June 11, 2021

DeepL Selected Text

Unofficial DeepL translate extension for Thunderbird.

Rated 4 out of 5 stars (6)
1,976 users
Updated June 10, 2021

Mailing list filter

Mail filter search term using mailing lists (and not whole addressbooks).

Rated 5 out of 5 stars (1)
165 users
Updated June 7, 2021

*cloud - FileLink for Nextcloud and ownCloud Featured

Upload large attachments to your Cloud and send the link by email

Rated 5 out of 5 stars (22)
13,655 users
Updated June 4, 2021

Quote Colors (Tb 68, 78, 91)

Configure text and background colors of quotes in mail and news messages.

Rated 5 out of 5 stars (7)
2,735 users
Updated June 4, 2021

Allow HTML Temp

Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).

Rated 4 out of 5 stars (76)
10,858 users
Updated June 4, 2021