Top-Rated Extensions


TB Menubar Unread Notifier Requires Restart

Output the number of unread messages in all inboxes into the temporal file /tmp/testUnread. As a result, this output file can serve as an input for other applications to read and show notification either on a dock bar or on the menubar.

Rated 3 out of 5 stars (4)
36 users

BirdFon Requires Restart

BirdFon, a lightweight and elegant phone plugin, makes Thunderbird a speaking friend in your online life. With BirdFon you can call your friends in a way similar to the SkypeOut service. The major BirdFon advantage is that it allows you to make...

Rated 3 out of 5 stars (4)
1 user

Copy Folder Requires Restart

The missing Thunderbird "copy folder" feature! Copy folders or entire POP/IMAP accounts recursively to any location while maintaining folder structure.

Rated 3 out of 5 stars (44)
10,836 users

hitsniffer visitors monitoring Requires Restart

hitsniffer analytics is a powerful and simple to use real time visitors activity monitoring tool for your website and blog. allows you to monitor your website visitors live and get extreme useful stats data.

Rated 4 out of 5 stars (2)
153 users

E-Mail Bodytext Autoexport Requires Restart

Extracts the bodytext from an E-Mail with the specific subject into a setable directory.

Rated 4 out of 5 stars (2)
130 users


This addon adds an entry in the right-click menu which re-threads selected messages together (groups selected messages into the same thread)". This is done by _modifying_ messages; the author of the addon declines any responsibility for data loss.

Rated 3 out of 5 stars (4)
91 users

Profile Buttons

A button to be able to open the profile folder, along with two buttons to create profiles, and also switch the current profile.

Rated 3 out of 5 stars (4)
1,286 users

Display mailing list header Requires Restart

This extension implements RFC 2369 for Thunderbird: Special mailing list header fields in the mail are parsed, and the links are displayed in the extended header view. You can click them to simply go to the archive, request help or unsubscribe.

Rated 3 out of 5 stars (6)
374 users

Image Zoom (ugly fixes) Requires Restart

A lazy fixing of Image Zoom

Rated 3 out of 5 stars (6)
596 users


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Rated 3 out of 5 stars (7)
209 users

Chat Notifier with Pop-Ups Requires Restart

Allows to be notified when you receive chat message in Thunderbird.

Rated 3 out of 5 stars (3)
180 users

Lovebird Requires Restart

Email organized around the people you care about.

Rated 3 out of 5 stars (3)
71 users

Mail Size Report Requires Restart

Report current size of mail with attachment files in status bar

Rated 3 out of 5 stars (3)
38 users

Newsgroup Links Requires Restart

Displays a link to the Google groups url of a newsgroup post, and an option to copy it.

Rated 3 out of 5 stars (3)
33 users

UMTools Requires Restart

Add new options to TB's Unsent Messages behavior.. ...

Rated 3 out of 5 stars (3)
2 users

GTG Task Button Requires Restart

Easily transform a page or an e-mail into a GTG task with a single click.

Rated 4 out of 5 stars (1)
108 users

Toodledo Sync Requires Restart

ToodledoSync is an extension that I did for my need of a GTD system using Thunderbird and Toodledo.
IT IS NOT MAINTENED ANYMORE as I do not have any time. I'll give the (ugly) code to anyone willing to maintain it.

Rated 4 out of 5 stars (1)
537 users

Old-style smilies Requires Restart

Reverts the smilies in Thunderbird to those of version 2.

Rated 4 out of 5 stars (1)
1,942 users

ICS Inspector Requires Restart

This extension provides many debugging options related to calendar development. This includes showing the ics data for an event or calendar, evaluating javascript on an event or calendar, and some menu options for debugging.

Rated 4 out of 5 stars (1)
1,192 users

Date on Thunderbird Requires Restart

在thunderbird statusbar显示年月日

Rated 4 out of 5 stars (1)
24 users