Layout Switcher Requires Restart

Switches the mail layout to 'wide view' when on a large enough monitor.

GIMPS Opener

Open Great Internet Mersenne Prime Search (GIMPS) 2ᴾ-1 exponent numbers.

Right Encoding Requires Restart

Adds the Character Encoding menu to the context menu

Gather the senders ! Requires Restart

Select all the mails in a directory sent by the selected authors.

POW -- Plain Old Webserver Requires Restart

Turn the web on its head with the Plain Old Webserver (POW), which adds a server to your browser.

Ungender

Eine Thunderbird-Erweiterung, welches Binnen-Is und Ähnliches von Webseiten entfernt. Es basiert auf der bekannten Firefox Erweiterung Binnen-I be gone.

宅配便の配達状況 Requires Restart

右クリックメニューから宅配便各社の配達状況ページへジャンプします。

Mutt Keys Requires Restart

Creates Mutt like key bindings for Thunderbird. Inspired by the mouseless extension.

Bamboo Feed Reader Requires Restart

Feed reader | RSS - ATOM - OPML

This extension has NOT been rewritten with the new WebExtensions API (Firefox Quantum).
No future version is planned by the original developer.

Bamboo is still running with Palemoon.

Smileyfixer

Fixes smileys that show in emails created by Outlook as J.

Bugmail (fixed version) Requires Restart

A bugzilla companion (fixed version). Originally maintained by Fabrice Desré.

Sender Name Requires Restart

conceptERP eMailexport Requires Restart

Exportiert eMails in das Contentmodul von conceptERP.

Unselect Message Requires Restart

Prevents Thunderbird from selecting the next message after you've deleted or moved the previously selected ones. Stay in control of which message you want to have selected and displayed in the preview pane; that piece of spam you're deleting...

AutoRssDeleter Requires Restart

Deletes rss message if the website link was clicked while Ctrl holding

Rspamd-spamness

Rspamd spam filtering system score visualization.

Colored Diffs

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

Prevent Delete Requires Restart

Prevent deletion of messages with a defined tag.

Switch Message Colour Requires Restart

Adds a Toolbar-Button to Thunderbird to switch between the mails' original colouring and your user defined colouring.

Reject Button 1.0 Requires Restart

Annoyed by receiving mails with missing or wrong subjects or meaningless message bodies? Simply reject them with the Reject Button Add-On and enforce proper e-mail etiquette at the cost of just a few friendships.