Markdown Here Requires Restart
Write your email in Markdown, then make it pretty.
Emoji Menu Requires Restart
Adds the ability to easily insert emojis into your composed messages in Thunderbird.
Toggle Word Wrap Requires Restart
Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.
Flexible Identity Requires Restart
Selects an identity based on the recipients list when sending an email
Highlighter Requires Restart
Quickly highlight some text in Thunderbird message composing windows.
Emoji Requires Restart
Add emojis to your e-mails.
SmilieInserter Plus Requires Restart
Insert smilies in messages.
Clippings Requires Restart
Save frequently-entered text for pasting later.
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.
CryptoData Requires Restart
Easily and quickly to encrypt / decrypt:
Private messages via e-mail, blogs, social networks, forums, websites, images, etc
Support: Firefox, Thunderbird and SeaMonkey
Lovebird Requires Restart
Email organized around the people you care about.
MALA Hindi Spell Checker by MCRPV, (Anurag Seetha) Requires Restart
MALA (Makhanlal) Hindi Shabd Shodhak to check Spelling of Hindi Unicode Text by Makhanlal Chaturvedi National University of Journalism & Communication, Bhopal, India. Chief Developer - Dr. Anurag Seetha. The program is Released Under the GNU GPL V 3
Resubmit Requires Restart
(Re)submit multiple messages to a predefined recipient(s)
Check Attachment before Send Requires Restart
Confirms to send a mail with any attachment.
Attach from Clipboard Requires Restart
Create file attachments directly from the system clipboard.
Single Domain Requires Restart
Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.
RM: EXTERNAL: Requires Restart
Removes 'EXTERNAL: ' from the start of an email subject if it is preceded by 'RE:' or 'FWD:' (case insensitive). The removal is done after the 'Send' button is pressed.
Edit Message Encoding Fallback Requires Restart
Fallback to a safe encoding, if you are replying to a message with unsupported encoding like UTF-16LE. (workaround for the Bug 961983)
mms Auto Correct Requires Restart
AutoCorrect for the Compose window.
Attachemnt Encoding Detector Requires Restart
To detect file encoding of attachments, this forces to Thunderbird to use an encoding detector for a specific locale instead of the generic one.