Recently Updated Extensions

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Darko

Simple dark mode (theme) for your Thunderbird messages.

FastAddons.com/#darko

Rated 5 out of 5 stars (13)
1,847 users
Updated Sept. 25, 2021

BorderColors D

Shows a colorful border around the "New Message" window, so you can tell different identities apart.

Builds on the original BorderColors and the "GT" version, adding different border styles.

Rated 4 out of 5 stars (23)
5,644 users
Updated Sept. 24, 2021

WarnAttachment

WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.

Rated 5 out of 5 stars (8)
2,332 users
Updated Sept. 23, 2021

CloneMessage

When composing an email, CloneMessage allows you to duplicate the current state of the email.

Not yet rated
3 users
Updated Sept. 23, 2021

Profile Switcher

Adds options to launch other profiles.

Rated 5 out of 5 stars (16)
382 users
Updated Sept. 22, 2021

Dark Reader

Dark mode for every email. Take care of your eyes, use dark theme for night and daily messaging.

Rated 4 out of 5 stars (13)
3,053 users
Updated Sept. 21, 2021

CardBook Featured

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon

Rated 4 out of 5 stars (358)
71,677 users
Updated Sept. 21, 2021

Empty Folder

Adds a context option to mail folders for moving all included messages to trash.

Rated 4 out of 5 stars (5)
140 users
Updated Sept. 21, 2021

Addressbooks Synchronizer

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

Rated 4 out of 5 stars (70)
23,084 users
Updated Sept. 21, 2021

Telegram Web in Thunderbird

Once the add-on is installed, a new icon appears in Thunderbird Mail toolbar. Click on it to open the Telegram Web tab.

Not yet rated
88 users
Updated Sept. 21, 2021

GCalTab

GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.

Rated 5 out of 5 stars (7)
1,219 users
Updated Sept. 21, 2021

Notebird

Prendi appunti su tutte le email!

Not yet rated
25 users
Updated Sept. 20, 2021

HeaderTools Lite

Allows to modify the header and the source of messages

Rated 5 out of 5 stars (29)
287 users
Updated Sept. 20, 2021

Colored Diffs

Color diffs sent by SVN/CVS/GIT/Mercurial...

Rated 4 out of 5 stars (20)
494 users
Updated Sept. 19, 2021

Header Tools Lite

Allows to modify the header and the source of messages

Rated 4 out of 5 stars (46)
835 users
Updated Sept. 16, 2021

Send Later

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (235)
70,669 users
Updated Sept. 16, 2021

Display Mail User Agent T Featured

Displays the mail program with which the selected mail was written

*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.

Rated 5 out of 5 stars (14)
8,446 users
Updated Sept. 15, 2021

ThreadVis

Displays a small graphic visualising the context (thread) of the currently selected email.

Rated 4 out of 5 stars (124)
4,504 users
Updated Sept. 15, 2021

changeQuote

It's an extension that changes the format of reply header.
You can choose between the standard Thunderbird reply header, a detailed reply header or a Customized reply header.
You can configure it in the Tools ->Add-on Preferences -> changeQuote.

Rated 4 out of 5 stars (17)
1,145 users
Updated Sept. 15, 2021

ConfirmBeforeDelete

Ask a confirm before to delete some items

Rated 4 out of 5 stars (8)
1,167 users
Updated Sept. 15, 2021