Up & Coming Extensions

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LaTeX It! Requires Restart

This addons allows you to write LaTeX expressions in your emails such as $x^2$ or $$\sum_{x=0}\infty$$ and have them all replaced by a PNG image with the corresponding formula inside.

Rated 4 out of 5 stars (31)
372 users

Open Google Calendar Requires Restart

Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)

Rated 5 out of 5 stars (9)
2,023 users

Provider for CalDAV & CardDAV

This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync".

Rated 5 out of 5 stars (2)
3,532 users

Provider for Exchange ActiveSync

Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync

Rated 5 out of 5 stars (2)
6,536 users

Mark All Read Button Requires Restart

Adds toolbar buttons to Mark All emails as Read, Mark Thread as Read, and Goto Next Unread Thread.

Rated 4 out of 5 stars (37)
2,611 users

Paranoia Requires Restart

Check if your emails arrived TLS-encrypted (and which corporations were able to read it nevertheless)

Rated 4 out of 5 stars (9)
1,367 users

Enhanced Desktop Notifications

Provides enhanced new mail desktop notifications using the notify-send library.

Rated 4 out of 5 stars (8)
2,312 users

Signal Spam Requires Restart

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

Rated 3 out of 5 stars (50)
10,935 users

ThunderBirthDay Requires Restart

Display birthdays from the Thunderbird addressbooks as events in Lightning.

Rated 4 out of 5 stars (87)
12,239 users

TbSync

TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.

Rated 5 out of 5 stars (43)
13,844 users

Duplicate Contacts Manager Requires Restart

This Thunderbird add-on searches address book(s) for pairs of matching contact entries.
It can automatically delete entries that have equivalent or less information than the other one.
Any remaining matches are presented for manual treatment.

Rated 5 out of 5 stars (6)
3,231 users

CustomizeMyBird

This add-on offers ui tweaks to improve Thunderbirds appearance (classic squared tabs, custom tab height, custom scrollbars, alternative Add-on Manager/Preferences appearance, compact main toolbars, toolbar icon sets and many more).

Rated 5 out of 5 stars (13)
5,019 users

Smiley Fixer Requires Restart

Fixes Wingding Smileys in Outlook-generated emails

Rated 4 out of 5 stars (22)
3,963 users

Add Signature Requires Restart

Simply add your signature manually (right mouse click) to your emails

Rated 3 out of 5 stars (40)
5,347 users

Emoji Requires Restart

Add emojis to your e-mails.

Rated 5 out of 5 stars (17)
10,850 users

Highlighter Requires Restart

Quickly highlight some text in Thunderbird message composing windows.

Rated 4 out of 5 stars (61)
9,189 users

Lightning QR Code Add-on

Integrate QR codes for calendar events into tooltips for easy transfer to mobile devices.

Rated 5 out of 5 stars (13)
2,114 users

Get Selected Mails Requires Restart

Gets new messages for selected mail accounts.

Rated 5 out of 5 stars (10)
1,133 users

Grammalecte [fr] (for Thunderbird) Requires Restart

French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.

Rated 5 out of 5 stars (6)
4,355 users

Purge! Requires Restart

Add toolbar icons to purge (compact folders) and/or delete junk messages to your toolbar and thread context...

Rated 4 out of 5 stars (17)
2 users