Recently Updated Extensions
quickFilters Requires Restart
Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.
Colored Diffs Requires Restart
Color diffs sent by SVN/CVS/GIT/Mercurial...
CardBook Requires Restart Featured
Esign Requires Restart
Электронная подпись для сообщений в Thunderbird на основе API клиента "ГУЦ"
Opacus SugarCRM/SuiteCRM Thunderbird Extension Requires Restart
Enables the archiving of emails into SugarCRM/SuiteCRM from Thunderbird 3 and above.
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
Auto Filter Timer Requires Restart
Run existing message filters on any folder at a specified interval. Simply right-click the desired folder then choose from the [AUTOFILT] menu items. This is a hack/clean-up of another coder's work, but works perfectly. Use at your own risk
Mail Merge Requires Restart Featured
Mass Mail and Personal Mail
This add-on offers ui tweaks to improve Thunderbirds appearance (squared tabs, custom tab height, alternative Add-on Manager appearance, compact main toolbars and more). v2.1.0+ for Tb52-62+
Duplicate Contacts Manager Requires Restart
This add-on searches the given address book(s) for matching contact entries.
It can automatically delete entries that have equivalent or less information than some other one.
Any remaining matches are presented to the user for manual treatment.
Quicktext Requires Restart
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
CardDAV Browser Requires Restart
A utility to browse vCards stored on a CardDAV server.
QuoteCollapse Requires Restart
Collapse and expand quotes. Please see the extension homepage for further information.
Note that MozDev has shut down long ago (mailing list etc). Add-On homepage, source code and issue tracker are on GitHub, as linked on this page.
Signature Switch Requires Restart
Switch the signature on/off or choose a new one from your predefined set...
ExQuilla for Microsoft Exchange Requires Restart
Thunderbird email accounts connecting to Microsoft Exchange Web Services.
Disable DragAndDrop (Thunderbird) Requires Restart
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
pCloud for Thunderbird Requires Restart
Easily send large attachments with Thunderbird without leaving your email!
Move the Thunderbird menu bar to the top. Choose from a selection of visual styles + colors. Add frequently used bookmarks and an avatar icon without wasting precious screen space. Bookmark your favorite sites, emails, folders or configuration pages.
Layout Button Requires Restart
A toolbar button to switch between layouts.
KeeBird Requires Restart
Use KeePass Password Safe to manage your login credentials.
This is the replacement for the KeeFox extension for Thunderbird.