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Send Unsent Mail Button

Toolbar button to send unsent messages.

Rated 5 out of 5 stars (2)
234 users

Filter Manager

Adds a Filters Button, opens Filter Manager

Rated 5 out of 5 stars (6)
1,972 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 4 out of 5 stars (9)
383 users

Config Button

Adds a Config Button, opens about:config in a dialog or a new tab.

Rated 5 out of 5 stars (3)
1,512 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)
266 users

Aranese spell checker

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

Not yet rated
13 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)
16,732 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)
39 users

ThunderAI (ChatGPT in your emails!)

ThunderAI uses the capabilities of ChatGPT to enhance email management.
It enables users to analyze, write, correct, and optimize their emails.
There is no need for an API key and is possibile to use this extension even with a free account!

Rated 5 out of 5 stars (7)
918 users

Mark Subfolders Read

Adds a context option to folders for marking all contents of the selected folder and all subfolders as read.

Rated 2 out of 5 stars (1)
8 users

Zulip - Quick Access

Quick Access to Zulip in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Not yet rated
2 users

Balochi Spellchecker for UniBal Script

This add-on is a Balochi spellchecker based on the UniBal Balochi script.

This is a pre-beta version as the dictionary has 1000+ words and not all Balochi Affix rules are implemented.

Please use it and give your feedback

Rated 3 out of 5 stars (1)
1 user

Kiswahili Spell Checker

Kiswahili Spell Checker

Not yet rated
49 users

Lower Sorbian dictionary

Spellchecking dictionary for Lower Sorbian language.

Not yet rated
8 users

Tatar spellchecker dictionary

Tatar dictionary for spell-checking in Firefox and Thunderbird.

Орфографический словарь Firefox и Thunderbird для проверки правописания татарского языка.

Not yet rated
1 user

Babyish spellchecker

Babyish Spellcheck dictionary

Not yet rated
3 users

Owl for Exchange

Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).

Rated 5 out of 5 stars (195)
46,017 users

FileLink Provider for Box

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

Rated 3 out of 5 stars (12)
13,591 users

Open Tab

Link open in new tab.

Rated 5 out of 5 stars (6)
496 users

enUS deDE bilingual dictionary

This is a bilingual dictionary for American English and German Standard German.
It is meant for users who regularly write in German and English.
With it, you will not need to manually switch between dictionaries for the two languages.

Rated 5 out of 5 stars (1)
18,965 users