Newest Extensions


Auto-Mark Folder Read

New messages can be automatically marked as read in common folders (e.g. suspected spam, trash, drafts, templates).

Not yet rated
0 users
Added May 20, 2022


This extension allows you to easily insert accented characters as you type in firefox or thunderbird. It is similar to abctajpu (no longer supported). With the default settings, simply press "e" followed by "\" to insert "é" "a\" to insert "à" etc...

Not yet rated
3 users
Added May 10, 2022

Contact Finder

Autocomplete a list of contacts when sending a message by searching their name in the address book.

Not yet rated
6 users
Added May 9, 2022

TUD-CERT Phishing Report

Adds a phishing report button to the toolbar to enable members of Technische Universität Dresden to report suspicious e-mails to TUD-CERT with just a few clicks. If desired, an optional comment can be entered upon each report.

Not yet rated
18 users
Added May 5, 2022


Quickly Open Web Links using custom context menu with selected text as input

QuickOWL saves one's time in copying text from email and pasting in browser page to do some action or searching.

Not yet rated
5 users
Added May 1, 2022


Modern encryption in Thunderbird

** Currently in testing phase **
What you can do:
1. Set your secret key in the addon's tab page and acus will automatically decrypt incoming emails
2. Generate a new key pair
3. Encrypt plain text

Not yet rated
2 users
Added April 11, 2022

Minimize on startup

Minimize thunderbird window on startup!

Not yet rated
129 users
Added April 10, 2022

Joplin Export

Export your emails from Thunderbird to Joplin. To use the add-on, a running Joplin application is required (

Please note that this is not an official product of the Joplin team, but rather developed by a private person.

Rated 5 out of 5 stars (2)
43 users
Added April 7, 2022


Allow the user to configure custom CSS that will be added to messages when edited
(new, reply and forward). The custom CSS will be added to a newly created <style>
element in the email's head.

Not yet rated
10 users
Added April 4, 2022

Zivver for Thunderbird

This extension automatically detects Zivver messages and decrypts them on-the-fly using the Zivver API. Messages are decrypted only when actively displayed by the user and are never stored locally.

Not yet rated
4 users
Added April 4, 2022

Send then Archive

Automates the process of archiving a message that has been replied to.

Not yet rated
7 users
Added March 29, 2022


MailExtension to get password from KeePassXC.

Rated 5 out of 5 stars (2)
166 users
Added March 24, 2022


Send SMS via sms77

Not yet rated
14 users
Added March 22, 2022

CatchAll Bird

This extension improves the use of CatchAll-Addresses with Thunderbird.
It handles incoming messages addressed to all [email protected] for a fixed domain.
Incoming emails are automatically sorted into subfolders of INBOX identified by the prefix.

Rated 5 out of 5 stars (2)
21 users
Added March 21, 2022


AddOn for sending regimail with Thunderbird on Windows and Linux.

In order to use this AddOn, you need to install the regify client on your system and configure it with a valid regify account.

Not yet rated
2 users
Added March 21, 2022

Jitsi Meet event generator

Event and link generator for Jitsi Meet service.

Not yet rated
35 users
Added March 15, 2022


Integration between Thunderbird and Cultured Code's Things application.

Not yet rated
2 users
Added March 12, 2022

Autocopy 78+

Automatically copy any text in an email when the text is selected.

Rated 5 out of 5 stars (3)
47 users
Added Feb. 25, 2022


You can prepare four fixed phrases, select them when composing an email, and insert them in the body of the email.

Not yet rated
3 users
Added Feb. 22, 2022


Provides a keyboard shortcut (Shift + Alt + Delete by default) to move mail to its account's Trash folder, regardless of normal delete setting.

Not yet rated
9 users
Added Feb. 16, 2022