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ReminderFox

ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.

Rated 4 out of 5 stars (421)
152,820 users
Updated April 17, 2014

CALDAV - Search/Subscribe

Add CalDAV search & subscribe feature to Lightning

Rated 1 out of 5 stars (5)
2,618 users
Updated April 7, 2014

tzpush

Z-Sync to Thunderbird Addressbook
Will sync Thunderbird address book to Zentyal, Zarafa, Horde and outlook.com/hotmail.

Rated 4 out of 5 stars (4)
622 users
Updated March 9, 2014

SyncKolab

SyncKolab can synchronize your calendar, address book and tasks against an IMAP server in Kolab formats version 1 (vCard/iCal) or version 2 (XML) or turn your Thunderbird/Lightning into a native Kolab Client (http://kolab.org).

Rated 3 out of 5 stars (70)
7,854 users
Updated March 9, 2014

DM Sync

This plugin allows you to synchronize addressbooks and contacts stored on the DM mail server

Not yet rated
27 users
Updated March 6, 2014

ExQuilla for Microsoft Exchange

Thunderbird email accounts, including contacts, connecting to Microsoft Exchange Web Services.

Rated 3 out of 5 stars (56)
11,452 users
Updated March 6, 2014

Addressbooks Synchronizer

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

Rated 4 out of 5 stars (55)
33,117 users
Updated February 16, 2014

CategoryManager

This extensions enhances the category feature introduced by the SOGo-Connector: It allows to send emails to all the members of a category and provides a few category managing functions. The SOGo-Connector needs to be installed as well.

Rated 4 out of 5 stars (1)
137 users
Updated January 24, 2014

Display Contact Photo

Displays the contact photo/image/picture of the sender/recipient while reading or composing a message. Supports photos in a local folder and the 'Face' header for embedded photos. The add-on adds new generic photos and many styling possibilities.

Rated 4 out of 5 stars (72)
9,322 users
Updated January 9, 2014

Scan'Mail

Scan'Mail is a QR Code generator that allows you to transfer easily information from your mail client to your mobile phone.

Rated 5 out of 5 stars (4)
547 users
Updated January 9, 2014

Awesome ldapInfoShow No Restart

Show contact photo and other info from Local Dir, Addressbook, LDAP, Facebook, LinkedIn, Flickr, Gravatar etc

Rated 4 out of 5 stars (5)
566 users
Updated January 6, 2014

Serial Letter

Provides the ability to start writing a template-derived letter directly from within the address book. Supports also multiple recipients. Supports only TeX and similar systems at the moment.

Not yet rated
149 users
Updated December 23, 2013

sipgateFFX for Firefox and Thunderbird

The sipgate extension enables a practical overview for your account, direct call list notifcations, a speed access to several parts of sipgate's website, initiaiting click2dial calls, sending messages and faxes directly from your browser.

Rated 4 out of 5 stars (17)
5,343 users
Updated December 3, 2013

Automatic dictionary switching No Restart

Extension that remembers the language of the spellchecker used when composing and switches to it every time you write to that person.

Rated 5 out of 5 stars (12)
2,135 users
Updated November 30, 2013

PopMailListRecipients

Adds a toolbar button to expand address book lists to its recipients - useful to stripe out some of them when sending mail...

Rated 4 out of 5 stars (7)
653 users
Updated November 30, 2013

Opacus SugarCRM/SuiteCRM Thunderbird Extension

Enables the archiving of emails into SugarCRM/SuiteCRM from Thunderbird 3 and above.

Rated 5 out of 5 stars (4)
1,714 users
Updated November 22, 2013

OBM Connector

OBM Lightning Calendar and addressbooks connector

Not yet rated
282 users
Updated October 25, 2013

Contact Tabs

Contact Tabs enhances Thunderbird to give you quick access to all your contacts directly from Thunderbird's main window: Use the powerful search field to find your contacts and open them in a new tab for viewing and editing.

Rated 5 out of 5 stars (37)
19,519 users
Updated October 10, 2013

Flexible Identity

Selects an identity based on the recipients list when sending an email

Rated 4 out of 5 stars (17)
1,746 users
Updated September 28, 2013

gContactSync

Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, Plaxo contacts, and more.

Rated 4 out of 5 stars (146)
32,079 users
Updated September 26, 2013