Message Composition

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Mark Read on Reply

Mark messages as read when you replied to them.

Rated 5 out of 5 stars (2)
131 users
Added Sept. 9, 2022

Advanced Composer

Creates quote header in Ms Outlook style, message templates, signatures, message recipient groups, and more.

Rated 4 out of 5 stars (4)
413 users
Added Aug. 21, 2022

External Editor Revived

Edit emails in external editors such as Vim, Neovim, Emacs, etc.

Rated 5 out of 5 stars (7)
317 users
Added July 7, 2022

Reply with subaddress

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

Example: Your primary email is [email protected], you receive a mail to the subaddress [email protected], the sender of replies is set to [email protected].

Rated 3 out of 5 stars (3)
61 users
Added June 28, 2022

Open in XPS | XPSLogic

U kunt met deze extensie tickets en taken openen door middel van de knop open in XPS

Er moet wel eerst een client worden ingevuld dit kunt u invullen onder opties

Not yet rated
8 users
Added June 22, 2022

Netiquette checker and wrapper

RFC 1855 compatible as well as Epita compatible.

This Addon provide a mail checker and an auto 72 column wrapper.
What is checked:
- Subject
- Greeting
- Body
- Salutation
- Quoting
- Signature

Rated 3 out of 5 stars (1)
404 users
Added June 21, 2022

AddAccents

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...

Rated 5 out of 5 stars (2)
149 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
364 users
Added May 9, 2022

acus

Update 2023: This addon will be replaced by "arcus".

Modern encryption in Thunderbird

** Currently in testing phase **
What you can do:
1. Set your secret key and automatically decrypt emails
2. Generate a new key pair
3. Encrypt plain text

Not yet rated
3 users
Added April 11, 2022

CustomCSS

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.

Rated 5 out of 5 stars (4)
161 users
Added April 4, 2022

sms77

Send SMS via sms77

Not yet rated
78 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.
For each prefix the AddOn can create a new identity and folder.

Rated 5 out of 5 stars (4)
85 users
Added March 21, 2022

regimail

AddOn for sending regimail with Thunderbird on Windows, MacOS and Linux.

*IMPORTANT:*
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
13 users
Added March 21, 2022

Jitsi Meet event generator

Event and link generator for Jitsi Meet service.

Rated 1 out of 5 stars (2)
139 users
Added March 15, 2022

composeSelectMacro

定型文4つ保存しておいて、メールを作成する時にそのテキスト文を挿入できるツールです
You can prepare four fixed phrases, select them when composing an email, and insert them in the body of the email.

Not yet rated
30 users
Added Feb. 22, 2022

Recently

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

Not yet rated
436 users
Added Jan. 27, 2022

Grammar, Proofreading & Spell Checker

Check the grammar and spelling directly inside Thunderbird using Wordeep technology

Rated 4 out of 5 stars (4)
648 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 4 out of 5 stars (3)
113 users
Added Jan. 17, 2022

Seafile Filelink

A FileLink provider

With it you can store attachments on a seafile share

Rated 4 out of 5 stars (3)
159 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
339 users
Added Dec. 11, 2021