Message Composition

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Russian Spelling Dictionary

Select a text in Russian appearing on any web page and get a spelling check for it immediately!

Not yet rated
1 user
Updated March 26, 2015

Automatic Dictionary 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 (17)
2,564 users
Updated March 24, 2015

Send Later

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (33)
51,986 users
Updated March 19, 2015

SendToSecondEmail

This Extension lets you send Mails to both, first and second email address...

Not yet rated
8 users
Updated March 7, 2015

Extra Format Buttons

Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.

Rated 5 out of 5 stars (1)
218 users
Updated February 26, 2015

Markdown Here

Write your email in Markdown, then make it pretty.

Rated 5 out of 5 stars (14)
5,940 users
Updated February 16, 2015

Kmaleon Extension

Con esta extensión podrás hacer una copia de tus emails en el programa kmaleon.

Not yet rated
31 users
Updated January 27, 2015

CryptoData

Easily and quickly to encrypt / decrypt
For users: private messages via e-mail, blogs, social networks, forums, etc.
For webmasters: websites, images, photos, etc.
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (3)
930 users
Updated January 13, 2015

ThunderPEC

ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) in Thunderbird.

Rated 4 out of 5 stars (6)
10,680 users
Updated December 22, 2014

AVIM

An input method editor (IME) for Vietnamese. Type Vietnamese diacritics directly into any Web page, Web app, or dialog box.
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Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, và hộp thoại.

Rated 5 out of 5 stars (30)
3,139 users
Updated December 21, 2014

CodeHighlight

highlight code in email.

Rated 3 out of 5 stars (1)
37 users
Updated December 10, 2014

Clippings

Save frequently-entered text for pasting later.

Rated 4 out of 5 stars (159)
32,763 users
Updated December 10, 2014

Transliterator No Restart

As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.

Rated 5 out of 5 stars (75)
7,950 users
Updated December 9, 2014

Resubmit

Re-submit messages received from users to a predefined recipient(s)

Not yet rated
15 users
Updated December 7, 2014

Synnefo for Filelink

Add Synnefo support to Thunderbird's Filelink feature.

Not yet rated
4 users
Updated December 7, 2014

Filemail Attachments

With Filemail Thunderbird Add-on you can send large files directly from Mozilla Thunderbird using Filemail. Dec 2014: The 100 first people can sign up for a free account here: http://bit.ly/1z2f94L

Rated 3 out of 5 stars (1)
220 users
Updated December 7, 2014

Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (132)
47,514 users
Updated December 6, 2014

Emoji Menu

Adds the ability to easily insert emojis into your composed messages in Thunderbird.

Rated 4 out of 5 stars (1)
518 users
Updated November 8, 2014

Posting Style Enforcer

Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.

Rated 5 out of 5 stars (3)
53 users
Updated November 7, 2014

Flex Confirm Mail

Confirm mail address and attachments based on flexible rules.

Rated 1 out of 5 stars (1)
4,765 users
Updated November 5, 2014