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List Unsubscribe

Adds a button to unsubscribe from newsletters and other bulk email that has the List-Unsubscribe header.

Rated 3 out of 5 stars (1)
119 users

Messenger - Quick Access

Quick Access to Facebook Messenger in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 3 out of 5 stars (2)
179 users

NTFNTF

NTFNTF: Notify on This Folder Not That Folder. Choose to enable or disable notifications on a per-folder basis.

Rated 4 out of 5 stars (5)
666 users

Thunderbird Email 2 CSV Exporter

This add-on has been thoroughly tested on all platforms up to Thunderbird version 115. It allows you to target specific file folders and tag them for export, generating a CSV-formatted export file. Great for a large number of emails and Mailchimp.

Not yet rated
151 users

OnMail - Quick Access

Quick Access to OnMail in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Not yet rated
6 users

Deselector

Adds a Deselect button to close messages.

Rated 4 out of 5 stars (1)
26 users

Junk Mail ByeBye

This extension identifies and protects you from spam emails, phishing emails, and other unwanted messages. It is primarily targeted towards filtering out spam in Japanese.

Rated 4 out of 5 stars (1)
101 users

Mailfence - Quick Access

Quick Access to Mailfence in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Not yet rated
6 users

ElsHelp

Extension for ElSchool diary

Not yet rated
1 user

Khmer Spellchecker

Khmer (km-KH) spellchecker by Tim Boeun.

Rated 5 out of 5 stars (2)
8 users

Uzbek spell checker

This is a spell checker for Uzbek language in Latin script.

Not yet rated
1 user

Dictionnaire orthographique kikongo

Correcteur orthographique en kituba de RDC, kikongo ya leta

Not yet rated
1 user

Haitian Creole spell checker

Korektè Òtograf Kreyòl (KÒK) se yon korektè òtograf otomatik gratis nan lang Kreyòl Ayisyen ki develope avèk èd LOGIPAM ak Kevin Scannell
Korektè Òtograf Kreyòl (KÒK) is a free Haitian Creole Spell Checker developed by LOGIPAM and Kevin Scannell

Rated 5 out of 5 stars (1)
13 users

Simpler English Dictionary Requires Restart

A Simpler English Spellchecker.

Not yet rated
1 user

Azerbaijani Spellchecker

Azerbaijani SpellChecker for Mozilla Firefox. Developed with love by Mozilla Azerbaijan.

Not yet rated
1 user

Provider for CalDAV & CardDAV

This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.

Rated 5 out of 5 stars (54)
29,625 users

FileLink Provider for Dropbox

Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.

Rated 4 out of 5 stars (22)
54,904 users

Darko

Simple dark mode (theme) for your Thunderbird messages.

FastAddons.com/#darko

Rated 5 out of 5 stars (32)
5,903 users

Toggle HTML

Adds a Toggle HTML button

Rated 4 out of 5 stars (8)
1,171 users

Deselect on Delete TB78

Disables selection of the next message when deleting.

A quick port of squib's "Deselect on Delete" for thundebird 78.

Rated 4 out of 5 stars (18)
511 users