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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)
259 users

QuickOWL

Quickly Open Web Links using custom context menu with selected text as input

QuickOWL saves one's time in copying text from email and pasting in browser page to do some action or searching.

Rated 5 out of 5 stars (1)
76 users

M-Hub Lite

Add Microsoft Office 365 Tabs to Thunderbird! Services supported by M-Hub Lite: Calendar, People, OneDrive, Word, Excel, PowerPoint, & Bing. Need business or enterprise support? Get M-Hub Pro: https://www.schiffner.com/software/m-hub-pro

Rated 3 out of 5 stars (5)
309 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)
990 users

Topic Tree / Notebook in TB

* A place to 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
* Backup
* Print notes
* Notes for emails: XNote++

Rated 3 out of 5 stars (5)
378 users

Weatherlicious

A dynamic theme based on weather data from OpenWeatherMap.

Rated 4 out of 5 stars (8)
360 users

Toggle HTML

Adds a Toggle HTML button

Rated 4 out of 5 stars (8)
1,024 users

Darko

Simple dark mode (theme) for your Thunderbird messages.

FastAddons.com/#darko

Rated 5 out of 5 stars (31)
4,169 users

Thematic

Quickly switch between your themes or back to the default.

Rated 1 out of 5 stars (1)
517 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)
267 users

Change Link Appearance

Changes the appearance of links when displaying a message

Not yet rated
87 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
28 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)
282 users

Open Google Tabs

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

Not yet rated
82 users

Phoenity Icons

Phoenity icons for Thunderbird

Rated 5 out of 5 stars (68)
13,304 users

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
6 users

Search Button

Toolbar button to invoke message search dialog window.

Rated 5 out of 5 stars (9)
2,664 users

Move Folder (context-menu)

Adds the "Move to" menu entry to the folders panel context menu, allowing to move a Local folder (and its content) to another.
This feature is similar to the native one within message(s) context menu ("Move To"), but it applies to the folder tree.

Rated 3 out of 5 stars (2)
419 users

onedrivewebapp

Adds browser action icon to toolbar to open OneDribe. See https://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/04/microsoft-onedrive-button/

Rated 4 out of 5 stars (1)
83 users

New Bing Anywhere

New Bing isn't just for Edge anymore. Anywhere you want

Rated 2 out of 5 stars (2)
25 users