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Attach from Clipboard

Create file attachments directly from the system clipboard.

Rated 4 out of 5 stars (27)
5,911 users

ThreadVis

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

Rated 4 out of 5 stars (137)
3,382 users

ReFwdFormatter

Remove the ">" prefix from quote when you make a reply.

[Source code] https://github.com/isshiki/ReFwdFormatter

Rated 4 out of 5 stars (15)
2,114 users

List Addons in Windows' Programs

List addons in Windows' "Add or Remove Programs".

Rated 5 out of 5 stars (1)
9,960 users

TexTra

Thunderbirdのメールのテキストを翻訳、辞書引きを行います。

Rated 4 out of 5 stars (2)
699 users

EDS Calendar Integration

Integrates calendars events with Gnome clock applet

Rated 5 out of 5 stars (25)
736 users

BiDi Mail UI

Direction control and BiDi-related charset misdetection correction

Rated 5 out of 5 stars (53)
1,817 users

LocalFolders

Add as many local folders as you want to.
New folders can reside on mapped or network locations.

Rated 4 out of 5 stars (38)
12,475 users

Correct Identity

Ever sent mail from the wrong email address because you forgot to select the correct identity?

Rated 4 out of 5 stars (119)
2,087 users

No Message Pane Sort

No Message Pane Sort prevents accidental resorting of the message pane by disabling mouse button clicks on the column headers, thus, locking the sorting order of your emails.

It is still possible to sort messages by ctrl-clicking the header.

Rated 5 out of 5 stars (54)
3,817 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 (10)
2,803 users

Unmangle Microsoft ATP Safelinks

Users of outlook.com and o365 who have Advanced Thread Protection enabled will have all URL's in emails changed to redirect them to an Microsoft filter before opening. This is a bad idea.

This plugin will change the URL back to the original value.

Rated 5 out of 5 stars (6)
687 users

Quick Folder Key Navigation

This extension makes it possible to quickly navigate to a particular folder in the folder pane simply by typing the first few letters of the folder name when the folder pane has focus.

Rated 4 out of 5 stars (15)
880 users

EuropeanMX Spam Reporter

Train your EuropeanMX filter by reporting unrecognized spam back to us.

Rated 3 out of 5 stars (3)
209 users

SubSwitch

Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.

Rated 4 out of 5 stars (13)
493 users

Paranoia

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

Rated 4 out of 5 stars (14)
638 users

QuickArchiver

Get things done and clean up your inbox! When you move an e-mail the first time, QuickArchiver remembers the destination folder and lets you move more e-mails with a single click. You can apply rules by sender, recipient, and subject.

Rated 4 out of 5 stars (31)
1,069 users

Copy Sent to Current

Allows to place a copy of sent messages (aka FCC) into the currently active folder or any other folder you choose, when you create the message. Usually the copies are placed into the 'Sent' folder. For replies, you may also move the original message.

Rated 4 out of 5 stars (103)
1,705 users

ThreadKey

Strike the 'T' key to sort messages by thread, strike the 'U' key to sort them unthreaded again, just like the 'G' key switches to Grouped By Sort view.

Rated 4 out of 5 stars (31)
1,311 users

TORPEDO - TOoltip-poweRed Phishing Email DetectiOn

TORPEDO ist ein Tool zum Erkennen von betrügerischen Links (Phishing). Bewegen Sie die Maus über einen Link in einer Email. TORPEDO zeigt Ihnen die tatsächliche Webadresse in einem Tooltip an und hilft Ihnen, diese zu untersuchen.

Rated 5 out of 5 stars (9)
1,338 users