Recently Updated Extensions



Color-codes compose windows depending the active e-mail identity, to avoid sending messages from the wrong account.

Rated 4 out of 5 stars (38)
591 users
Updated September 11, 2010


Do not send mail to the addresses found into notTo field.

Rated 5 out of 5 stars (6)
347 users
Updated September 8, 2010

EMail Address Crawler

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

Rated 4 out of 5 stars (90)
4,256 users
Updated September 7, 2010


Sometimes you need to select a specific SMTP server for sending the current message? Then SendVia is for you.

SendVia provides the `Send' button of message composition windows with a drop-down menu from which you can select or create the SMTP server...

Rated 4 out of 5 stars (12)
335 users
Updated August 27, 2010

Flat Folder Tree

Selectively breakout or promote sub-folders under an intermediate folder in the folder tree. Use with IMAP servers where some folders remain collapsed under special namespace like [Gmail] or the INBOX itself.

Rated 4 out of 5 stars (23)
3,336 users
Updated August 18, 2010


The mailclassifier extension helps you to move the email in the right folder, it uses multi-level bayesian filtering...

Rated 3 out of 5 stars (19)
316 users
Updated August 11, 2010

Indian Language Transliterator

Indian Language Transliterator (developed at IIIT Hyderabad, India) is a Mozilla Thunderbird Add-on, developed to enable Thunderbird users to compose and send messages in 10 Regional Indian Languages, using their regular QWERTY keyboard!!!

Rated 4 out of 5 stars (1)
66 users
Updated August 4, 2010

External Email Alert

Alerts user to confirm that it is ok to send an external email.

Rated 3 out of 5 stars (6)
414 users
Updated July 27, 2010


Parolu enables Firefox to do speech synthesis of web pages written in Esperanto, useful for the blind (mainmenu.parolu) and for language learners (contextmenu.parolu). You'll need to install MBROLA on your machine first.

Not yet rated
17 users
Updated July 26, 2010


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 (26)
2,321 users
Updated July 26, 2010


This includes 3 features about the find toolbar. First, the dictionary-assisted find. Second, more customizable Find Toolbar. Third, the highlight feature like Safari 3.

Rated 4 out of 5 stars (48)
861 users
Updated July 20, 2010


Email Bookmarks are here ! ... eMark your important emails.

Do you have an email that will need to revisit/attend later on ? Would you like to keep it handy and get it with a simple click ? Bookmark your important emails with the eMarks addon.

Rated 4 out of 5 stars (17)
340 users
Updated July 12, 2010

Force RTL

Force a LTR locale to behave as if it was a RTL locale.

Rated 5 out of 5 stars (6)
210 users
Updated July 12, 2010


Export/Import Account Settings.....

Rated 2 out of 5 stars (28)
7,190 users
Updated July 2, 2010

Colored Diffs

Color diffs sent by SVN/CVS/GIT/Mercurial...

Rated 4 out of 5 stars (20)
881 users
Updated June 29, 2010

AddressBook In Mode ToolBar

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

Rated 4 out of 5 stars (7)
1,718 users
Updated June 29, 2010


ThunderCal simply gives you a toolbar button that you can use to run Google Calendar inside Thunderbird. Inspired by the ThunderWave add-on.

Rated 4 out of 5 stars (14)
13,619 users
Updated June 23, 2010

Color Source

Add syntax highlighting of code in various languages to email messages via context menu.

Rated 5 out of 5 stars (2)
79 users
Updated June 22, 2010


This Add-on provide ability to mark as read subfolders.

Rated 4 out of 5 stars (18)
299 users
Updated June 14, 2010


This Add-on provides the smart and simple templates and abilities to customize the quote header flexibly.
Templates can be inserted automatically at the new/repling/forwarding message. A different template can be used respectively per account.

Rated 4 out of 5 stars (111)
1,861 users
Updated June 10, 2010