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KeepRunning

Once you close Thunderbird you will no longer be able to see your new emails. This plugin keeps Thunderbird active in the background, meaning you can still receive your new emails after closing the app. Use this when the app is in the startup.

Rated 5 out of 5 stars (5)
1,562 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
109 users

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

Simpler English Dictionary Requires Restart

A Simpler English Spellchecker.

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)
12 users

Azerbaijani Spellchecker

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

Not yet rated
3 users

Colored Folders Requires Restart

Add colors to your folders in Thunderbird!
Must-have for better organisation + intuitive and speedy workfow...

This is project "Color Folders" (originally by Fisheater), corrected, resurrected, restaurated, extended and republished.

Rated 4 out of 5 stars (151)
3,940 users

Confirm-Address2 Requires Restart

Confirm E-mail addresses before sending mail.
This is forked from https://github.com/Meatian/confirm-address and works with Thunderbird 68.

Rated 5 out of 5 stars (2)
220 users

Two Dynamic Birds

An extension of the "Two Little Birds" and "Dracula" themes that includes a toggle button to turn on dark mode.

The position of the light/dark toggle button can be customised to avoid it covering the cute birds!

Not yet rated
54 users

OpenFolder

This add-on makes it easy to open folders on a file server.

In order to use the add-on, you need to install two things: the add-on and the linked app.
You can download the linked app from the following website.

https://openfolder.net/

Rated 3 out of 5 stars (2)
188 users

Check Domain NG Requires Restart

This is a fork of "Check Domain" addon, which can run on 68 version of Thunderbird.

Rated 3 out of 5 stars (2)
1 user

Thematic

Quickly switch between your themes or back to the default.

Rated 1 out of 5 stars (1)
514 users

Open In Conversation Requires Restart

Make the default message list action be "Open Message in Conversation" when double-clicking or using the "Enter" key to open an email from the message list.

Rated 5 out of 5 stars (3)
39 users

Weatherlicious

A dynamic theme based on weather data from OpenWeatherMap.

Rated 4 out of 5 stars (8)
364 users

Australian English Dictionary

FEATURES
- Profanity
- Racism
- Slang words
and so much more!

GitHub repo @ https://github.com/Caskexe/Australian-English-Dictionary
Firefox Add-ons listing @ https://addons.mozilla.org/en-GB/firefox/addon/australian-english-dictionary/

Not yet rated
1,464 users

InfoCodex DocSummarizer

Intelligent document and mail summarization tool based on the artificial intelligence of InfoCodex. Create better summaries chapter-by-chapter and tag them in your preferred language.

Rated 1 out of 5 stars (1)
11 users

ThunderWebTabs

Opens Google Keep, Google Photos, Android Messages or any other website in Thunderbird's tab.

Users who encounter "Browser not supported errors" should try changing their User Agent. For more details, please visit the "Support site".

Rated 5 out of 5 stars (1)
269 users

Spacebar Clicker

With Spacebar Clicker, gamers can now test their spacebar speed within the browser. Every gamer can install the extension and practice to increase how many times they press the spacebar.

Not yet rated
0 users