Add-ons

Mail Redirect by Onno Ekker, Pawel Krzesniak

Allow to redirect (a.k.a. "remail") mail messages to other recipients.

QuickFolders (Tabbed Folders) by Realraven (Axel Grude), Alexander Malfait

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Check and Send by H.Ogi

Check the message contents and addresses before you send the message...

MinimizeToTray by Mook, Brad Peterson

Minimizes Mozilla windows into the system tray. Also includes a right clickable tray icon menu to further load only the windows you want visible...

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!

Thunderbird Message Filter Import/Export by Wind Li

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

Auto Zip Attachments by Tomer Rotstein

Auto Zip Attachments allows you to easily compress (zip) attachments.

SubSwitch by Tomasz Krajewski

Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.

Automatic Export by Steffen

exports by an intervall or after pressing the button selected calendars in a defined folder in two modes - normal and backup...

On my homepage is the current version.
Here on this site it takes a long time after i publish a new version.

Sender Verification Anti-Phishing Extension by Joshua Tauberer

Protects you from phishing attacks by verifying the From: address domain name of emails as you read them. Sender Policy Framework (SPF) and DNS-based reputation lists are used.

Attachment Sizes by Frank DiLecce

Ability to see attachment sizes ...

2nd Classic by SmartBright

Looks like some Mac application.
2nd Classic is Simple and Clean Theme for Thunderbird 2.

MR Tech Toolkit by mrtech

(Formerly Local Install) The primary goal of this extension is to provide the tools needed to install and manage extensions and themes locally and tons of other features.

Note: With Toolkit 6.0 Auto Archiving is fully working in Firefox 2.0 and temp...

ACE CuteBird (Graphite) by John Locke

All-in-one Mac style theme! Please check preview here first (it rocks):
http://tanjihay.deviantart.com/art/Cutebird-1-2-9-63240221

To get sub themes: Open Add-ons window, right click on Cutebird, click "About Cutebird"

more info at http://foxdie.us

Delete Junk Context Menu by chuonthis

Adds 'Delete Mail Marked as Junk' to folders' right click...

Collector's Note Erstellt einen Junk-Ordner und ermöglicht das Löschen von Junk aus dem Kontextmenü aus