Message Composition

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Toggle Word Wrap Requires Restart

Toggle word wrapping and <PRE> element wrapping in the message composition and HTML display windows, respectively. Based on original version by Kaspar Brand.

Rated 5 out of 5 stars (2)
190 users
Added Oct. 8, 2019

changeQuote Requires Restart

It's an extension that changes the format of reply mails.

Not yet rated
66 users
Added Sept. 4, 2019

FileLink Provider for Box

Uploads your large attachments to your Box instead of sending them by email.

Rated 2 out of 5 stars (1)
1,389 users
Added May 21, 2019

Custom Sender Address and Reply Requires Restart

Select sender mail address based on the recipient and reply with the same address

Rated 5 out of 5 stars (1)
10 users
Added March 31, 2019

AutoCopy_rebirth Requires Restart

Lightweight add-on that automatically copies any highlighted text to clipboard.

Rated 4 out of 5 stars (3)
76 users
Added March 8, 2019

Use BCC Instead C Requires Restart

This is a version of 'Use BCC Instead' updated for Thunderbird 64 and above.

It prevents you accidentally sending an email to a large number of recipients without hiding their addresses from each other by using BCC.

Rated 5 out of 5 stars (2)
274 users
Added Feb. 19, 2019

TarotSignature Requires Restart

This version provides a custom button for the message composer.
You need to customize your toolbar of the message composer.
The signature is hard-coded into the source code.
The signature is NOT being inserted automatically on window-open.

Not yet rated
4 users
Added Feb. 13, 2019

PopMailListRecipients 2

Expands address book lists to recipients addresses in the compose window

Not yet rated
78 users
Added Feb. 8, 2019

FileLink Provider for Dropbox

Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.

Rated 4 out of 5 stars (6)
3,691 users
Added Dec. 17, 2018

stripImages Requires Restart

Remove all images from message with one click.
Places a "strip images" button on the toolbar of the message compose window.
Clicking the button will remove all images from the message.
This helps keep mailbox disk space down.

Not yet rated
4 users
Added Dec. 6, 2018

BorderColors D Requires Restart

Shows a colorful border around the "New Message" window, so you can tell different identities apart.

Builds on the original BorderColors and the "GT" version, adding different border styles.

Rated 4 out of 5 stars (5)
2,468 users
Added Nov. 17, 2018

Owl for Exchange

Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird

Rated 4 out of 5 stars (32)
27,116 users
Added Oct. 20, 2018

EasyRight2Left Requires Restart

Change direction from Left to Right and Right to Left for Persian, Arabic, Hebrew etc. This Thunderbird extension is based on ComposeRTF available in https://addons.thunderbird.net/en-US/thunderbird/addon/composertf/

Rated 5 out of 5 stars (1)
108 users
Added Aug. 21, 2018

Asciidoctor for Thunderbird Requires Restart

Type some text in your mail's body, hit the asciidoctor button and transform your mail into a pretty html5 asciidoctor document. Font awesome and code highlighting are enabled.

Rated 5 out of 5 stars (1)
66 users
Added Dec. 23, 2017

Copiar Assunto Requires Restart

Adiciona um botão para copiar o Assunto do email selecionado para a área de transferência

Add a button to copy the Subject line of the selected email to the clipboard

Not yet rated
3 users
Added Nov. 19, 2017

Stop Ignoring Reply:To Requires Restart

Default "Reply" functionality pays attention to "Reply-To" in original email

Rated 5 out of 5 stars (10)
302 users
Added Aug. 24, 2017

Reply to Multiple Messages Requires Restart

Add menu commands for replying to multiple messages at the same time.

Rated 5 out of 5 stars (7)
689 users
Added May 28, 2017

One-by-One Forward Requires Restart

Highlight multiple emails, right-click, then select "One-by-One Forward". This extension will allow you to forward the selected emails, one-by-one, to the recipients you specify using your choice of attachment handling.

Rated 3 out of 5 stars (5)
341 users
Added May 26, 2017

Copy Message ID Requires Restart

Adds a button to the message view toolbar to copy the message ID to the clipboard. This is useful when sending email replies via the command line.

Rated 4 out of 5 stars (1)
127 users
Added April 12, 2017

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)

Not yet rated
1 user
Added Dec. 6, 2016