Top-Rated Extensions

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CALDAV - Search/Subscribe Requires Restart

Add CalDAV search & subscribe feature to Lightning

Rated 3 out of 5 stars (11)
2,321 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)
64 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)
309 users

Old-style smilies Requires Restart

Reverts the smilies in Thunderbird to those of version 2.

Rated 4 out of 5 stars (1)
1,622 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)
1,248 users

Date on Thunderbird Requires Restart

在thunderbird statusbar显示年月日

Rated 4 out of 5 stars (1)
16 users

Highlight External Addresses Requires Restart

This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.

Rated 4 out of 5 stars (1)
275 users

ALL To CC BCC Requires Restart

送信先アドレスのすべてをTo、CC、BCCに変更するボタンです。
メール作成画面の、件名の下に追加されます。

Rated 4 out of 5 stars (1)
1,082 users

Hyperactive

Scans hyperlinks in composed messages and alerts if one of the hyperlinks is broken.

Rated 4 out of 5 stars (1)
34 users

Linux Growl Requires Restart

Sends linux notifications using notify-send when a new email or a RSS feed is received.

Required:
sudo apt-get install notify-osd

Rated 4 out of 5 stars (1)
44 users

DBus Notifications Requires Restart

Sends DBus notifications when events are detected (a new message is received).

Rated 4 out of 5 stars (1)
0 users

TweeQuilla Twitter for Thunderbird (Obsolete) Requires Restart

Twitter for Thunderbird (Bundle). Provides twitter statuses in the format of email messages, and allows updating Twitter status from Thunderbird.This addon packages the TweeQuilla-app extension with the required "New Account Types" extension.

Rated 4 out of 5 stars (1)
1 user

EzStylist Requires Restart

Allows including CSS when composing e-mails.

Rated 4 out of 5 stars (1)
0 users

Navigation Shortcuts Requires Restart

This extension adds three shortcuts to Thunderbird to navigate more easily.

These shortcuts are: Focus message pane, go one folder up and go one folder down

Rated 4 out of 5 stars (1)
136 users

Directory Contact Tabs Requires Restart

Displays additional information about contacts from LDAP directory servers. The new panels are provided by one or several customized Directory Contact Tabs (Data) add-ons.

Rated 4 out of 5 stars (1)
1 user

Repeat Borders Requires Restart

Adds darker borders to repeat events to distinguish them from single events.

Rated 4 out of 5 stars (1)
419 users

Indian Language Transliterator Requires Restart

Indian Language Transliterator (developed at IIIT Hyderabad, India) is a Mozilla Thunderbird Add-on, developed to enable Thunderbird users to compose and send messages in 10 Regional Indian Languages, using their regular QWERTY keyboard!!!

Rated 4 out of 5 stars (1)
35 users

Mutt Keys Requires Restart

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

Rated 4 out of 5 stars (1)
26 users

RtoRe Requires Restart

Erase the R: when reply

Rated 4 out of 5 stars (1)
0 users

Rethread

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 (5)
58 users