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RemindIt

Help in reminding mails to be answer or sent again. Choose a reminder date for each received or send message that are highlighted in the message list, depending on their status (expired, soon to exprire, to be reminded). Sending a reminder is eased.

Rated 3 out of 5 stars (27)
1,760 users

PrintingTools NG

PrintingTools NG enables many layout and formatting options for printing messages with header borders, sorting, attachment lists etc. PDF output can be auto named and Page options can ease printer settings.

It is your printing toolbox.

Rated 4 out of 5 stars (38)
26,869 users

Signal Spam

Ajoute une fonction pour signaler, en un clic, les e-mails que vous considérez comme indésirables ou frauduleux à Signal Spam.
L'extension vous alerte si vous consultez un e-mail contenant des liens vers un site répertorié comme frauduleux.

Rated 3 out of 5 stars (163)
16,743 users

Attachment Viewer: view in a tab, slideshow

View attachments in TB
Images, office files, mp3, mp4
Use Dropbox viewer for 175 file types (in v3)
* Docx, xlsx, pptx, pdf preview
* Slideshow of images
* Zoom/drag to position
* Rotate/flip image
* Download dialog with thumbnail of image

Rated 4 out of 5 stars (20)
4,664 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)
1,804 users

BiDi Mail UI

Direction control and BiDi-related charset misdetection correction

Rated 5 out of 5 stars (53)
1,924 users

FireTray Requires Restart

A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...

Rated 4 out of 5 stars (291)
1,141 users

Quote Colors & Collapse

Configure text and background colors of quotes in mail and news messages. From up addon version 3 (Thunderbird 91) you can collapse quotes.

Rated 5 out of 5 stars (15)
4,412 users

LookOut (fix version)

LookOut decodes winmail.dat (TNEF encoded) files that may come from a misconfigured Microsoft Exchange server or Outlook user allowing access to the original attachments
Support: Thunderbird

Rated 4 out of 5 stars (95)
174,285 users

mailmindr

Follow up for Thunderbird E-Mails.

Web: https://mailmindr.net/
Twitter: @mailmindr

Rated 4 out of 5 stars (76)
3,137 users

FolderFlags

Allows users to edit the flags Thunderbird sets on folders.

Rated 5 out of 5 stars (24)
3,361 users

Edit Email Subject (EES)

This module allows you to change/edit email subjects

Rated 4 out of 5 stars (122)
8,127 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)
2,251 users

Allow HTML Temp

Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).

Rated 4 out of 5 stars (89)
10,424 users

Web Translate

Web Translate is easy to use translator for your Web browser / Thunderbird!

Rated 4 out of 5 stars (24)
43,601 users

Remove Duplicate Messages

Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).

Rated 4 out of 5 stars (290)
97,154 users

Thunderbird Conversations Featured

This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.

Rated 4 out of 5 stars (553)
27,761 users

AutoRssDeleter Requires Restart

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

Not yet rated
0 users

Tabbed Mail Preferences Requires Restart

Enhances control over some aspects of tabbed mail browsing.

Rated 2 out of 5 stars (2)
1 user

Change Requires Restart

In-page Currency Conversion Extension for Thunderbird and Firefox...

Rated 4 out of 5 stars (30)
0 users