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Toggle Headers

Allows toggling the message header setting through a keyboard shortcut.

Rated 3 out of 5 stars (3)
813 users

Toggle Proxy

Toggle Proxy adds a status bar/toolbar icon to toggle between two proxy settings which can be set in the preferences or toggle via a shortcut key (alt + x) if you don't use the add-on bar.

Rated 4 out of 5 stars (31)
9,388 users

Toggle Word Wrap

Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.

Rated 4 out of 5 stars (38)
6,826 users

ToggleFullHeaders

Allows you to customise the message panel buttons to add a "Toggle Headers" button that will switch between showing and hiding the full headers.

Not yet rated
39 users

ToggleReplied

Enables toggling of Replied/Forwarded states of messages.

Rated 5 out of 5 stars (6)
674 users

ToneQuilla

Adds a new action to mail filters to allow playing a particular sound when the filter matches. Also includes several sample sound files.

Rated 4 out of 5 stars (14)
2,169 users

Too Many Recipients

Contourne la limite du nombre de destinataires/e-mail des serveurs SMTP.
Gets around the limit on the number of recipients/e-mail of SMTP servers.
Evita la limitación de número de destinatarios/e-mail del servidor SMTP.

Rated 4 out of 5 stars (6)
1,180 users

Toodledo Sync

ToodledoSync is an extension that I've done to fill my need of a GTD system using Thunderbird and Toodledo. It allows to easily convert mails to toodledo tasks, addind all usefull fields to the mail compose window.

Rated 4 out of 5 stars (1)
810 users

Toolbar Buttons

A button pack for Firefox, Thunderbird and Sunbird

Rated 4 out of 5 stars (305)
132,802 users

Tools > Options… for Linux No Restart

Moves Edit > Preferences to Tools > Options…

Rated 5 out of 5 stars (6)
421 users

TorBirdy

This extension configures Thunderbird to make connections over the Tor anonymity network.

Rated 5 out of 5 stars (4)
1,774 users

TotalMessage

A new view for Thunderbird messages.

Rated 2 out of 5 stars (5)
176 users

TotalQuickFilter

Reboot the QuickFilter bar.

Rated 4 out of 5 stars (4)
191 users

Track Package

Track Packages from the right-click menu...

Rated 4 out of 5 stars (24)
3,618 users

Track your shipment

Link to tracking sites. (mainly Japanese companies)

Rated 3 out of 5 stars (4)
2,501 users

traduku

Translate text from English and other languages into Esperanto.

Traduku tekston de la angla kaj aliaj lingvoj al Esperanto.

Rated 5 out of 5 stars (1)
424 users

Translation Panel

Add Web Translation Features.

Rated 4 out of 5 stars (48)
1,438 users

Transliterator No Restart

Transliterator allows as-you-type conversion of text from one alphabet to another, as well as transliteration/detransliteration anywhere within documents.

Rated 5 out of 5 stars (65)
8,307 users

Trashcan

Have you ever accidentally deleted an event and didn't notice? Undo is no longer available? Then this extension is for you! All deleted items are put into a special Trashcan calendar for your safety.

Rated 4 out of 5 stars (1)
567 users

TrayHotKey

为Fx5.0 及以上版本提供系统热键(老板键)功能

Rated 5 out of 5 stars (38)
3,961 users