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Header Tools Improved

Allows to modify headers and source of messages

Rated 5 out of 5 stars (37)
2,580 users

Telegram Web in Thunderbird

Open Telegram Web in Thunderbird

Rated 5 out of 5 stars (5)
767 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)
300 users

Config Button

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

Rated 5 out of 5 stars (3)
1,315 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)
15,901 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

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)
318 users

Archive old messages

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

Not yet rated
436 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)
3,623 users

Metamorfik

The Altium Forums are the best way to participate in discussions, share tips, ask/answer questions and locate resources.

Not yet rated
1 user

BCM Bengali (Bangladesh) Spellchecker

Spellchecker for Bengali (Bangladesh) following Bangla Academy and Prothom Alo standards: See https://banglatypefoundry.com/spellchecker/

Not yet rated
9 users

Scriptable Notifications

Allows you to define an external script (bash, batch, python, ...) which is called so you can manage mail notifications / alerts the way you want.

Snap/Flatpak versions of Thunderbird not supported.

Rated 5 out of 5 stars (2)
295 users

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
101 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)
386 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)
31 users

ThunderAI (ChatGPT or Ollama in your emails!)

ThunderAI uses the capabilities of ChatGPT or Ollama to enhance email management.
It enables users to analyse, write, correct, and optimize their emails.

Rated 5 out of 5 stars (13)
2,040 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)
43 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)
928 users