Search

CustomCSS

Allow the user to configure custom CSS that will be added to messages when edited
(new, reply and forward). The custom CSS will be added to a newly created <style>
element in the email's head.

Rated 5 out of 5 stars (4)
167 users

ansitel Click-to-Dial

This plugin will call a selected number by clicking the right mouse button.

Rated 5 out of 5 stars (1)
90 users

BorderColors D

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 (33)
6,868 users

Search for

Context menu on message allowing quick filtering based on email/sender or domain

Rated 5 out of 5 stars (7)
1,112 users

Telegram Web in Thunderbird

Open Telegram Web in Thunderbird

Rated 5 out of 5 stars (5)
713 users

Autofile - fast e-mail to folder filing

Read an e-mail, hit Autofile button and it is filed / moved to the right mail folder based on the sender's address. No drag/drop needed. Autofile can discover folders to store each author mail. Will save you lots of time like defunct filemail.

Rated 4 out of 5 stars (5)
265 users

No tabs

Hides the tab bar and automatically removes all inactive tabs everytime a tab is opened or switched to.

Rated 5 out of 5 stars (5)
127 users

ShowContactFoto

Displays the contact photo/image/picture of the sender/recipients while reading/composing message.
Images are taken from local image files or Address Book (see addon's options page).

Rated 4 out of 5 stars (2)
37 users

Addon Compatibility Check for TB 102/TB 115/TB 128

Checks all installed add-ons for compatibility with Thunderbird 128 (or TB 102/115) and displays status information on a button in the main toolbar. This button will open a detailed overview, including links to alternatives for abandoned add-ons.

Rated 4 out of 5 stars (10)
15,726 users

Cypherdog Encryption

Encrypt any file, any text, and share via any medium, any time

Not yet rated
40 users

ENEX Tools

Add import/export functionality of Evernote export file (enex).
* Load enex file and open message composition window with the note content
* Export messages to enex file which can be loaded by Evernote desktop client

Not yet rated
72 users

Open in browser

A context menu item to open the links associated with feed items in the default browser and then mark them as read.

Rated 5 out of 5 stars (1)
281 users

Aify

Rewrite or generate text based on promps using OpenAI's API.

Configure on settings page (make sure to save) and start to use when writing your emails!

You must have a payment method on record with OpenAI and an API key. OpenAI charge for use.

Rated 5 out of 5 stars (10)
341 users

ReplyAsOriginalRecipientUp

When you reply to a mail sent to your personalized address (postfix/qmail/gmail extensions) such as john.doe+contactname@example.com, "From:" is replaced by your personalized address rather than your simple address.

Rated 4 out of 5 stars (8)
754 users

sms77

Send SMS via sms77

Not yet rated
67 users

FileLink for Plik

Plik no longer offers uploads without an account. So the add-in currently only works for self-hosted instances of the software. Currently I cannot promise a date for a fix. Sorry.

Rated 5 out of 5 stars (4)
3,297 users

Send then Archive

Automates the process of archiving a message that has been replied to.

Rated 2 out of 5 stars (5)
30 users

Config Button

Adds a Config button, opens about:config in a tab.

Rated 5 out of 5 stars (3)
1,262 users

ThunderThings

Integration between Thunderbird and Cultured Code's Things application.

Rated 4 out of 5 stars (3)
9 users

Send Unsent Mail Button

Toolbar button to send unsent messages.

Rated 5 out of 5 stars (2)
221 users