Message Composition



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
5 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
12 users
Added May 9, 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


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
13 users
Added April 4, 2022


Send SMS via sms77

Not yet rated
16 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)
22 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
40 users
Added March 15, 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


Recently is a small Mozilla Thunderbird extension for having the most recent contacts at hand

Not yet rated
36 users
Added Jan. 27, 2022

Grammar, Proofreading & Spell Checker

Check the grammar and spelling directly inside Thunderbird using Wordeep technology

Rated 5 out of 5 stars (1)
163 users
Added Jan. 24, 2022

RepSel: Reply to all selected mails

Reply to all selected messages with a single button press. E.g., compose a reply to all emails in a folder or those matching a search. Req. permissions: menues to add UI, messageRead to get sender, compose to add recipients, storage for settings.

Rated 5 out of 5 stars (2)
40 users
Added Jan. 17, 2022

Seafile Filelink

A FileLink provider

With it you can store attachments on a seafile share

Rated 3 out of 5 stars (3)
66 users
Added Jan. 4, 2022

MetaClean for Thunderbird

Removes metadata and hidden data in email attachments preventing the leakage of confidential information that occurs in this type of communication and avoiding possible economic and reputational damages derived from the malicious use of metadata.

Not yet rated
174 users
Added Dec. 11, 2021


When you reply to a mail sent to your personalized address (postfix/qmail/gmail extensions) such as [email protected], "From:" is replaced by your personalized address rather than your simple address.

Not yet rated
71 users
Added Nov. 23, 2021


When composing an email, CloneMessage allows you to duplicate the current state of the email.

Not yet rated
68 users
Added Sept. 15, 2021

Strip inline images

Adds a button to the compose window to remove inline images from messages. The images are replaced with their filename in angled brackets.

This is helpful when replying to long message threads with lots of embedded images.

Not yet rated
43 users
Added Sept. 7, 2021


Prendi appunti su tutte le email!

Not yet rated
79 users
Added Aug. 30, 2021


It permits just with a single click to copy an emoji.
There is a search-box and the "Most used emojis" section (the first one).

If you want to send feedback or report bug, please go to

Rated 5 out of 5 stars (4)
2,639 users
Added Aug. 30, 2021

✨ Awesome Emoji Picker ✨

Modern, nice emoji picker that you can use to find and select emojis. It will be copied to your clipboard or even directly inserted into the e-mail, when you click on it.

You will certainly like it.

Not yet rated
858 users
Added Aug. 10, 2021