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Add-on Preferences Button

Displays a menu that allows you to open the option/preference window for any add-on that has one.

Rated 5 out of 5 stars (3)
4 users

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Find Buttons

Adds buttons to open and manage the find bar.

Rated 3 out of 5 stars (2)
0 users

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Play drums! Requires Restart

Just… play drums with your keyboard!

Rated 4 out of 5 stars (20)
0 users

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Insert Link from Local File Requires Restart

Inserts links from local files via drag and drop on the composition window.

Rated 3 out of 5 stars (3)
17 users

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3e Calendar Requires Restart

Adds support for 3e calendars

Rated 1 out of 5 stars (1)
2 users

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Clean Subject Requires Restart

"Clean Subject" cleans the subject from multiple occurrences of subject prefixes such as ("Re: Re-2: Re:") and postfixes that are inserted by other clients. Words like "[SPAM]" can be cleaned as well. These prefixes can be defined in the preferences.

Rated 4 out of 5 stars (47)
37 users

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Stacked Inspector Requires Restart

Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.

Rated 5 out of 5 stars (10)
0 users

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Montezooma Requires Restart

Montezooma is a Thunderbird Addon that adds zooming functionality to windows.

Rated 4 out of 5 stars (6)
2 users

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New Plugin Disabler

Deactivates new plugins.

Rated 5 out of 5 stars (4)
0 users

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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 (2)
4 users

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Hindi Pop up Requires Restart

After installing this extension, just hover the mouse on top of an English word and a pop-up will appear with suggestions of possible hindi equivalents.

Rated 5 out of 5 stars (3)
0 users

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Moji Requires Restart

An integrated sidebar-dictionary for Japanese and Chinese including kanji dictionary.

Rated 4 out of 5 stars (9)
2 users

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Test Pilot for Thunderbird

Add-on has now been discontinued, see below.

Rated 1 out of 5 stars (15)
184 users

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Classicish Add-on Manager Requires Restart

A restyling of the Add-on Manager to a more native appearance.

Rated 4 out of 5 stars (17)
7 users

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Gitter Requires Restart

Assists to setup a chat account for gitter.im
Where developers come to talk.

Rated 3 out of 5 stars (1)
1 user

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Simple Steganography Requires Restart

Hide messages in PNG-32 images, extract them via context menu. The text is embedded invisibly by a "Least Significant Bit" algorithm.

You can also encode very short messages by re-sorting text lists and extract them via context menu.

Rated 5 out of 5 stars (1)
0 users

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IT Next Consultant Requires Restart

Assists to setup a chat account for IT Next Consultant, LLC.

Not yet rated
0 users

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Simple HT Jumper Requires Restart

A temporal simple jumper of HTML and Plan TEXT view mode on showing messages and replying messages for Thunderbird without changing the default setting.

Rated 5 out of 5 stars (16)
5 users

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Address Cleaner Replying Requires Restart

メッセージ返信時に宛先に含まれる表示名を除去します。
A display name is erased when an e-mail screen is opened.

Rated 5 out of 5 stars (2)
8 users

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CIX Forums Requires Restart

Open CIX Forums in Thunderbird. Free CIX accounts from https://forums.cix.co.uk/signUp.aspx?p=cixbasic

Rated 5 out of 5 stars (1)
0 users

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