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LookOut+ Requires Restart

LookOut is a plugin which allows to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

This version is a fix for Seamonkey 2.*.

Rated 4 out of 5 stars (5)
47 users

LCD Clock Requires Restart

displays a LCD Clock in your Toolbar

Rated 4 out of 5 stars (26)
6 users

Hindi Spell Checker

This is a real time spell checker for Hindi, supported on Firefox,
Thunderbird, and Seamonkey.

Not yet rated
159 users

AutoProxyMod Requires Restart

Based on original AutoProxy!

Rated 5 out of 5 stars (10)
0 users

Latin Dictionary

Latin dictionary

Rated 5 out of 5 stars (8)
332 users

Silent Block

Minimum and fast URL blocker.

Rated 4 out of 5 stars (31)
77 users

Stego Block Requires Restart

Embeds a small secondary, encrypted message in an email, known as a Stego Block.

Rated 4 out of 5 stars (1)
0 users

Launchy Requires Restart

Launchy will enable you to open links and mailto's with external applications...

Rated 3 out of 5 stars (87)
12 users

eCleaner Requires Restart

Clears preferences left by extensions after uninstallation

Rated 4 out of 5 stars (69)
18 users

ThunderBirthDay Requires Restart

Display birthdays from the Thunderbird addressbooks as events in Lightning.

Rated 4 out of 5 stars (97)
213 users

CuteButtons

Adds icons to buttons and/or menus.

Rated 4 out of 5 stars (95)
59 users

Hebrew spell-checking dictionary (from HSpell)

Hebrew spell-checking dictionary for Firefox and Thunderbird. Generated from data of the HSpell project version 1.4, and distributed freely under the AGPLv3.

Rated 4 out of 5 stars (20)
782 users

SoundPlus Requires Restart

SoundPlus customizes the sound that is played when a new message arrives for a particular contact in the address book, similar to mobile phones. There is also a variation that is played when a message arrives and it is a continuation of a thread.

Rated 3 out of 5 stars (15)
5 users

TreeStat Requires Restart

Display the open/closed status of Mozilla's trees

Not yet rated
0 users

Use Bcc Instead Requires Restart

Sorry but this addon is no longer supported in TB 60. See below.
Who among us has not made the mistake of sending a 'broadcast' email to a large number of recipients without using BCC; thereby revealing everyone's email addresses to all?

Rated 5 out of 5 stars (31)
50 users

EmailPicky 4 Requires Restart

Grab email addresses from emails from any selected Email Folder and add them to your contacts. (Email Crawler / Email ID Grabber / Bounced email collector) - Thunderbird Plugin
Note: It doesn't create duplicates, but shows as 'xxx messages added'.

Rated 3 out of 5 stars (15)
37 users

Bamboo Feed Reader Requires Restart

Feed reader | RSS - ATOM - OPML

This extension has NOT been rewritten with the new WebExtensions API (Firefox Quantum).
No future version is planned by the original developer.

Bamboo is still running with Palemoon.

Rated 4 out of 5 stars (259)
6 users

Subject Manager Requires Restart

Manages subject of composed emails.

Rated 5 out of 5 stars (27)
98 users

No need flash plugin on embeded youtube movies

No need flash plugin on embeded youtube movies

Rated 4 out of 5 stars (25)
43 users

Google+ Share for Thunderbird Requires Restart

Share a URL in Google+ directly from Thunderbird. This addon is the Thunderbird XUL version of Google+ Share for Firefox Desktop.

Rated 5 out of 5 stars (1)
0 users