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DevTools Button

Adds a DevTools Button, opens the Developer Toolbox

Not yet rated
454 users

UrgentMail

Raise X11 urgent flag if new mail is received.

This addon listens for incoming mails and causes the Thunderbird window to draw attention.

Rated 5 out of 5 stars (3)
247 users

Audio Preview

Adds a preview for audio files (wav, ..) to the message view, so it can be played directly.

Not yet rated
83 users

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)
1,555 users

Preferences Button

Adds a Preferences button

Rated 5 out of 5 stars (1)
335 users

tbkeys-lite

Custom Thunderbird keybindings

This add-on is a follow on to Keyconfig which is no longer supported.

It is aimed at power users. Please look at the GitHub site before leaving a one star review about documentation or usability.

Rated 5 out of 5 stars (60)
3,674 users

Full Address Column

Adds a full sender and recipient e-mail column to message list panel.

Rated 5 out of 5 stars (73)
5,227 users

Toggle HTML

Adds a Toggle HTML button

Rated 4 out of 5 stars (8)
998 users

Thematic

Quickly switch between your themes or back to the default.

Rated 1 out of 5 stars (1)
480 users

Darko

Simple dark mode (theme) for your Thunderbird messages.

FastAddons.com/#darko

Rated 5 out of 5 stars (31)
4,080 users

Mark All Read:WE

Mark all read (Web extension) - Adds a toolbar button to mark all unread messages in current folder as read.

*Note*
Version 2: Requires Thunderbird v128+
Version 1: Works best with Thunderbird v91+

Rated 3 out of 5 stars (19)
938 users

Change Link Appearance

Changes the appearance of links when displaying a message

Not yet rated
77 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)
265 users

Weatherlicious

A dynamic theme based on weather data from OpenWeatherMap.

Rated 4 out of 5 stars (8)
360 users

Old (classic) Icons

This replaces the new monochrome icons with the old/classic colorful icons. Uses the code from Phoenity Icons and the graphics from older Thunderbird versions.

Rated 5 out of 5 stars (29)
2,391 users

Last selected message

The add-on remembers the last selected message in visited folders. After restarting Thunderbird, when we enter the previously visited folder, this message will be displayed, just like in Microsoft Outlook.

Rated 3 out of 5 stars (4)
139 users

Open Google Tabs

Open up Google Calendar, Notes, and Microsoft Outlook in a new tab.

Not yet rated
90 users

ThunderSuite - Customize your Quick Access Sidebar

This extension allows user editing of the spaces sidebar.
Create custom spaces from the extension options, to turn the new toolbar introduced with Supernova into your personal quick access toolbox.

Rated 5 out of 5 stars (7)
281 users

Topic Tree / Notebook and Wiki in TB

* Keep notes and ideas
* Notes can be styled with images, tables, links, mindmaps etc.
* Full text search
* Copy and paste text/html
* Drag text/html into tree to create new note
* Link notes
* Backup
* Print notes
* Notes for emails: XNote++

Rated 3 out of 5 stars (5)
365 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
112 users