Up & Coming Extensions

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QuickFolders (Tabbed Folders)

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Rated 5 out of 5 stars (157)
11,829 users

Web Translate

The best Translator for your new Thunderbird 78!
Available also for your Firefox web browser.

Rated 5 out of 5 stars (2)
917 users

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)
641 users

Message Header Toolbar Customize

You can change icon display and button order. You can also hide unnecessary buttons.

Rated 5 out of 5 stars (18)
1,671 users

Quote Colors (Tb 68, 78)

Configure text and background colors of quotes in mail and news messages.

Rated 5 out of 5 stars (5)
1,349 users

Toggle Headers

Allows to switch between the normal header view and viewing all headers when viewing a message by using a keyboard shortcut (Ctrl+H).

Rated 4 out of 5 stars (10)
997 users

DKIM Verifier Featured

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (28)
8,433 users

Compact Headers

Limits displayed headers to 1 or 2 lines.

Rated 4 out of 5 stars (24)
5,149 users

Dictionary for recipient

Sets the spell check dictionary based on the first recipient

Not yet rated
1,867 users

MailHops

MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.

Rated 4 out of 5 stars (32)
1,179 users

Phoenity Icons

Phoenity icons for Thunderbird

Rated 5 out of 5 stars (31)
8,228 users

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 3 out of 5 stars (13)
3,592 users

QNote

Add notes to your e-mails. Drop-in replacement for XNote++ with more features.

Rated 5 out of 5 stars (29)
1,279 users

XNote++ Featured

Persistent sticky notes for Thunderbird associated to mails.

In TB 78, you can define the note position in the settings. If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.

Rated 5 out of 5 stars (104)
16,794 users

Auto Address Cleaner T

Remove comment, display name from addresses before sending mail.

This add-on is a fork of Auto Address Cleaner.
https://addons.thunderbird.net/thunderbird/addon/auto-address-cleaner/

Rated 4 out of 5 stars (4)
3,981 users

EditEmailSubject (Edit email Subject)

This module allows you to change/edit email subjects

Rated 4 out of 5 stars (91)
5,990 users

Send Later

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

Rated 5 out of 5 stars (218)
29,616 users

*cloud - FileLink for Nextcloud and ownCloud Featured

Upload large attachments to your Cloud and send the link by email

Rated 5 out of 5 stars (17)
9,295 users

Monterail Full Dark 2 for TB>68

Monterail Full Dark, a Thunderbird theme inspired by the mockup of Monterail

Rated 4 out of 5 stars (15)
2,577 users

Windows Taskbar Unread Badge

Put an unread mail count badge on the Thunderbird icon in the Windows taskbar.

Rated 4 out of 5 stars (38)
4,583 users