Add-ons

Shrunked Image Resizer by Geoff Lankow

Make your photos smaller, so they don't take forever to email.

*Shrunked Image Resizer is no longer maintained.*

Xpunge by Theodore Tegos

Empties the Trash and Junk folders, and compacts folders in multiple Thunderbird accounts.

Provider for Microsoft Exchange by Simon Schubert

The lightning-exchange-provider addon allows you to use Microsoft Exchange calendars in Thunderbird, via Exchange’s web services.

This addon only works with Microsoft Exchange 2007 and above. Exchange 2003 is not supported.

Duplicate Contact Manager by Marian Steinbach, Copelnug

Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.

EMail Address Crawler by CySlider

Automatically fill your address books or send mass mails with e-mail addresses extracted from all your e-mails.

Quick Folder Move by Philipp Kewisch

When filing messages, a search box will show up allowing you to quickly enter the folder name you want to move to.

If no search term is entered, a list of recent folders will show up instead.

Nostalgy by Alain Frisch

Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.

Firesizer by orev

Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.

Signature /Auto Paste /Prefill Fourms by RsCcman Production

Makes everyday entries to forms & forums simpler!
Add a sig. with just a Rclick of the mouse and select 'Add Sig.' from the context menu.
(Please, note: What you see in the pic is only an example. ThoseRMine Sorry, you have to make your own tabs. )

ThunderBrowse by GS! Networks

Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!

ThreadVis by ahubmann

Displays a small graphic visualising the context (thread) of the currently selected email.

Thunderbird Message Filter Import/Export by Wind Li

Thunderbird Message Filter Import/Export is a thunderbird/mozilla extension to import/export message filters.

Collector's Note I use "importexporttools" for mail transferring

Address Close Button by 46emak

Adds a Address Close Button to mail compose window.

Right Encoding by JoungKyun

Adds the Character Encoding menu to the context menu

eCleaner by flasresizerdeveloper

Clears preferences left by extensions after uninstallation