Up & Coming Extensions

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DeepDark for Thunderbird Requires Restart

Dark mode for Thunderbird UI

Rated 5 out of 5 stars (20)
1,506 users

Emoji Menu Requires Restart

Adds the ability to easily insert emojis into your composed messages in Thunderbird.

Rated 4 out of 5 stars (13)
4,444 users

*cloud - FileLink for Nextcloud and ownCloud

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

Rated 5 out of 5 stars (2)
915 users

ConfirmFolderMove Requires Restart

Introduces a preference that allows users to be prompted before moving folders.

Rated 5 out of 5 stars (16)
3,389 users

Open Google Calendar

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

Rated 4 out of 5 stars (48)
16,574 users

Display Quota Requires Restart

This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...

Rated 4 out of 5 stars (42)
32,695 users

Remove Duplicates Requires Restart

Removes duplicate messages

Rated 4 out of 5 stars (7)
1,456 users

FileLink provider for WebDAV

Uploads your large attachments to your WebDAV account instead of sending them by email.

Rated 3 out of 5 stars (4)
2,096 users

FileLink Provider for Box

Uploads your large attachments to your Box instead of sending them by email.

Rated 3 out of 5 stars (2)
4,298 users

Minimize on Close Requires Restart

Causes Thunderbird's main window to minimize instead of closing. You can still close Thunderbird through the menu.

Rated 4 out of 5 stars (21)
7,655 users

FileLink Provider for Dropbox

Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.

Rated 4 out of 5 stars (6)
8,303 users

Monterail Dark 2 for TB>68 Requires Restart

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

Rated 4 out of 5 stars (6)
1,488 users

Display Mail User Agent T Requires Restart

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 (5)
2,488 users

Profile Switcher Requires Restart

Adds options to launch other profiles.

Rated 4 out of 5 stars (4)
1,743 users

ImportExportTools NG Requires Restart Featured

Adds tools to import/export messages and folders (NextGen)

Rated 4 out of 5 stars (41)
82,438 users

AttachmentExtractor Continued Requires Restart

This add-on is a (work in progress) fixed version of the original Add-on "AttachmentExtractor" which is no longer supported and fixed by the original author.

It Extracts all attachments from selected messages and then can delete, detach...

Rated 5 out of 5 stars (42)
4,741 users

Phoenity Icons Requires Restart

Phoenity icons for Thunderbird

Rated 5 out of 5 stars (6)
3,147 users

Grammar Checker Requires Restart Featured

Checks grammar using LanguageTool.

Rated 4 out of 5 stars (15)
10,291 users

MRC Compose Requires Restart

Remplace la liste d'adresses par les champs standards (Pour, Copie à, Copie cachée à) avec l'autocomplétion.
Provides standards fields (TO, CC, BCC) with autocomplete to Thunderbird's compose pane.
For bug reports, please use support email.

Rated 4 out of 5 stars (61)
2,347 users

Colored Folders Requires Restart

Add colors to your folders in Thunderbird!
Must-have for better organisation + intuitive and speedy workfow...

This is project "Color Folders" (originally by Fisheater), corrected, resurrected, restaurated, extended and republished.

Rated 5 out of 5 stars (88)
13,407 users