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Birthday Reminder

Birthday Reminder reminds of upcoming birthdays for all contacts in Thunderbird's address book. Supports Lightning, reminders and even Google Calendar :-)

Rated 3 out of 5 stars (17)
4,461 users

Windows Contacts Loader

Loads Windows Contacts from Windows 7 or Vista in a Thunderbird Address Book called "Windows".

Rated 4 out of 5 stars (25)
4,406 users

Additional Chat Protocols for Thunderbird

Add support for chat protocols implemented in libpurple.

Rated 4 out of 5 stars (27)
4,092 users

Signature /Auto Paste /Prefill Fourms

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. )

Rated 4 out of 5 stars (20)
4,069 users

Custom Address Sidebar

Allow you to help address sidebar more useful.

Rated 5 out of 5 stars (5)
3,303 users

addressContext

An extension to add addressbook-related options to the context...

Rated 4 out of 5 stars (49)
3,113 users

Sender Name

Rated 4 out of 5 stars (37)
3,004 users

SoundPlus

SoundPlus customizes the sound that is played when a new message arrives for a particular contact in the address book, similar to mobile phones. There is also a variation that is played when a message arrives and it is a continuation of a thread.

Rated 3 out of 5 stars (12)
2,684 users

CALDAV - Search/Subscribe

Add CalDAV search & subscribe feature to Lightning

Rated 1 out of 5 stars (5)
2,412 users

THUNDER!Box

Thunder!Box allows transferring contacts from your Thunderbird-Addressbook to the phonebook of a connected AVM FRITZ!Box FON router and back. You may also use your addressbook to initiate calls.

Rated 5 out of 5 stars (24)
2,362 users

Contact Photos

Displays contact photos in the message header.

Rated 4 out of 5 stars (21)
2,309 users

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)
2,192 users

Export for Thunderbird & Lightning Launcher

Export for Thunderbird & Lightning is the worldwide unique printing and exporting solution for Mozilla Thunderbird and Lightning for Windows.
Multi lingual user interface: English, German, French and Spanish

Rated 3 out of 5 stars (6)
2,002 users

Flexible Identity

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

Rated 4 out of 5 stars (17)
1,779 users

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)
1,602 users

AddressBook In Mode ToolBar

Add adressbook button to "mode toolbar" (requires lightning extention)

Rated 4 out of 5 stars (7)
1,571 users

TBDialOut

Place phone calls directly from Thunderbird's address book

Rated 5 out of 5 stars (8)
1,551 users

Address Move Button

Allow you to add a Address Move Button to mail compose window.

Not yet rated
1,472 users

xSidebar for Thunderbird

Firefox sidebars for Thunderbird.

Rated 4 out of 5 stars (11)
1,458 users

SyncMab

This extensions can import and export mozilla address books at startup and exit of Thunderbird. You can first save a mab at a specific location e.g. on a network or the internet (Version 2.0) and then let it be updated every time TB starts up or...

Rated 3 out of 5 stars (21)
1,205 users