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ReplyAsOriginalRecipientUp

When you reply to a mail sent to your personalized address (postfix/qmail/gmail extensions) such as john.doe+contactname@example.com, "From:" is replaced by your personalized address rather than your simple address.

Rated 4 out of 5 stars (8)
202 users

ShowContactFoto

Displays the contact photo/image/picture of the sender/recipients while reading/composing message.
Images are taken from local image files or Address Book (see addon's options page).

Rated 4 out of 5 stars (2)
43 users

Cypherdog Encryption

Encrypt any file, any text, and share via any medium, any time

Not yet rated
35 users

ENEX Tools

Add import/export functionality of Evernote export file (enex).
* Load enex file and open message composition window with the note content
* Export messages to enex file which can be loaded by Evernote desktop client

Not yet rated
71 users

Thunderkey

Lets you perform common email tasks using keyboard shortcuts.

Rated 5 out of 5 stars (2)
5 users

Aify

Rewrite or generate text based on promps using OpenAI's API.

Configure on settings page (make sure to save) and start to use when writing your emails!

You must have a payment method on record with OpenAI and an API key. OpenAI charge for use.

Rated 4 out of 5 stars (8)
363 users

Aranese spell checker

Aranese (Occitan) spell checker - Diccionari ortogràfic d'Aranés

Not yet rated
12 users

Send Unsent Mail Button

Toolbar button to send unsent messages.

Rated 5 out of 5 stars (2)
214 users

BCM Bengali (Bangladesh) Spellchecker

Spellchecker for Bengali (Bangladesh) following Bangla Academy and Prothom Alo standards: See https://banglatypefoundry.com/spellchecker/

Not yet rated
5 users

Scriptable Notifications

Allows you to define an external script (bash, batch, python, ...) which is called so you can manage mail notifications / alerts the way you want.

Snap/Flatpak versions of Thunderbird not supported.

Rated 5 out of 5 stars (2)
266 users

ThunderAI (ChatGPT in your emails!)

ThunderAI uses the capabilities of ChatGPT to enhance email management.
It enables users to analyze, write, correct, and optimize their emails.
There is no need for an API key and is possibile to use this extension even with a free account!

Rated 5 out of 5 stars (6)
751 users

ConfirmBeforeDelete

Ask a confirm before to delete some items

Rated 4 out of 5 stars (19)
1,449 users

Owl for Exchange

Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).

Rated 5 out of 5 stars (195)
43,907 users

FileLink Provider for Box

Uploads your large attachments to your Box instead of sending them by email.

Rated 3 out of 5 stars (12)
12,763 users

Flat Folder Tree (updated)

Flat Folder Tree enables you to selectively breakout sub-folders under intermediate folders in the folder pane view. This is an updated version of the existing addon, now compatible with Thunderbird 60.

Rated 3 out of 5 stars (5)
92 users

ScrollAnywhere

Scroll without touching the scroll-bar!
Press Middle (Right / Left) mouse button anywhere on the page to scroll just like with scrollbar.

Features also:
- "grab and drag" scrolling
- customizable scrollbars!
- the Momentum auto-scroll

Rated 5 out of 5 stars (1)
318 users

TabsInStatusbar&IconsInMenubar

Move tabs in status bar and iconify menu bar.

This add-on researches new tabs' position and menubar iconification.
This add-on is as role as if task bar of Windows.

To Hyun-geol who I like.

Life in Holy Spirit.

Rated 5 out of 5 stars (2)
4 users

MessagePreview

MessagePreview adds a column to the Thunderbird message list to display the message preview in a tooltip on column row icon mouse hover or a short preview in the column row itself.

Rated 5 out of 5 stars (5)
52 users

CalendarSearchExport

Exports the results of a search in calendars

Not yet rated
25 users

Reply All Button

Add a "Reply All" button which never behaves like "Reply List". Intended to replace the Smart Reply button to avoid accidentally performing Reply List behavior.

Rated 5 out of 5 stars (1)
3 users