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DS-BCC

Data protection extension, to avoid data mishaps with circular mails:

1. warning for e-mail with multiple recipients not in BCC (exceptions possible)
2. warning for roundmails with a different recipient domain
3. warning if PGP key is present

Not yet rated
97 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)
319 users

Attachment Saver

Saves all attachments from multiple selected emails as a single zip file.

It provides an extra option in your context menu when selecting emails.

Rated 4 out of 5 stars (9)
921 users

Archive old messages

A context menu item to archive all messages than older than a given duration.

Not yet rated
430 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 (7)
167 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)
45 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 5 out of 5 stars (10)
942 users

Aranese spell checker

Aranese (Occitan) spell checker - Diccionari ortogràfic d'Aranés

Not yet rated
13 users

ThunderThings

Integration between Thunderbird and Cultured Code's Things application.

Rated 4 out of 5 stars (3)
12 users

sms77

Send SMS via sms77

Not yet rated
82 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

Filter Manager

Adds a Filters Button, opens Filter Manager

Rated 5 out of 5 stars (7)
2,051 users

Send Unsent Mail Button

Toolbar button to send unsent messages.

Rated 5 out of 5 stars (2)
291 users

SpamTester

SpamTester allows you to test the spam score of your email using popular anti-spam software (SpamAssassin, Rspamd...). This is useful to know if your email will fall into the recipient's spam (or even get your mail server blocked).

Not yet rated
204 users

New Folder Filters Button

Toolbar button to execute Run Filters on Folders from Tools menu
(based on Folder Filters Button Add-on for Thunderbird 68 by Chris Malek)

Rated 5 out of 5 stars (8)
347 users

Console messaging example

Console messaging example add-on

Not yet rated
3 users

Config Button

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

Rated 5 out of 5 stars (3)
1,400 users

Safelink removal

Replace URLs which have been rewritten by Office 365 Advanced Threat Protection with the original URL.

Rated 5 out of 5 stars (2)
178 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)
3,599 users

Export to ZIP

Export your mails and folders to a zip file!

Rated 3 out of 5 stars (12)
2,002 users