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Mark Button

Toolbar button to mark a message as read or unread with 1 click.

Rated 5 out of 5 stars (4)
158 users

Google Chat Tab

Open Google Chat in a Thunderbird Tab

Rated 4 out of 5 stars (9)
1,576 users

Seafile Filelink2

Store attachments on a seafile share.

Rated 5 out of 5 stars (1)
55 users

update-test

DO NOT install, this is for testing the update mechanism.

If you are interested in the functionality, use quicker quicksearch instead

Rated 3 out of 5 stars (1)
5 users

Check Time

メール送信時、勤務時間内かどうかを確認します。

Not yet rated
5 users

Quick Filter By

A simple extension that sets the Quick Filter based on the selected message fields. You can filter by either selecting "Quick Filter By" in the message list context menu or simply by alt-clicking on the message's sender, recipient or subject text.

Rated 5 out of 5 stars (6)
435 users

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 (32)
37,288 users

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 (28)
11,534 users

QNote

Add sticky notes to your emails with this feature-rich, drop-in replacement for the XNote++ extension.

Rated 5 out of 5 stars (64)
5,858 users

*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 (47)
34,664 users

Mahoor-Iranian-Date

This add-on adds a new column called "Persian Date" in recent versions in message list containing Iranian Date.

It is reimplementation of Iranian date for Thunderbird 78+ and 115+. The source is based on Full address column by Łukasz Kosson.

Rated 5 out of 5 stars (5)
63 users

telegramwebapp

Adds browser action icon to toolbar to open Telegram. See https://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/04/telegram-button/

Rated 3 out of 5 stars (2)
96 users

Date detection

Turn the dates and time references in your email (e.g. "tomorrow", "in 2 hour") into clickable links. Clicking them will create an event at the corresponding date.

Rated 2 out of 5 stars (3)
84 users

Dictionnaire occitan languedocien

Corrector ortografic en occitan lengadocian per Thunderbird.
Correcteur ortographique en occitan languedocien pour Thunderbird.

Not yet rated
13 users

Compact Headers

Limits displayed headers to 1 or 2 lines.

Rated 4 out of 5 stars (69)
11,343 users

FileLink Provider for OwnCloud and NextCloud

Uploads your large attachments to your OwnCloud or NextCloud server and instead inserts a public link into your email.

Rated 4 out of 5 stars (13)
1,032 users

Reply with subaddress

Reply to a message that was sent to a subaddess with the same address.

Example: Your primary email is tim@mymail.tld, you receive a mail to the subaddress tim+mailinglists@mymail.tld, the sender of replies is set to tim+mailinglists@mymail.tld.

Rated 3 out of 5 stars (3)
64 users

Archive 3 Month

Archive messages that are older than 3 months in inbox and sent folder

Not yet rated
50 users

AI Mail Support

Add-on designed to enhance email management for both personal and professional use, integrating a set of adanced AI (LLM) features to optimize the email management experience.

Not yet rated
22 users

Birdbox

Maintain your favorite websites as spaces within Thunderbird

Rated 5 out of 5 stars (1)
28 users