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Mark Subfolders Read

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

Rated 4 out of 5 stars (3)
102 users
Works with Thunderbird 91.0 - *
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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
4 users
Works with Thunderbird 106.0 - *
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Just Report It

Just Report It (https://justreport.it) is an email plugin which tackles spam the right way. Report emails straight to SpamCop, the Registrar, a custom email address or any combination in between!

Rated 5 out of 5 stars (17)
868 users
Works with Thunderbird 122.0 - *
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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)
403 users
Works with Thunderbird 78.0 - *
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Telegram Web in Thunderbird

Open Telegram Web in Thunderbird

Rated 5 out of 5 stars (5)
692 users
Works with Thunderbird 68.0 - *
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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 (8)
308 users
Works with Thunderbird 78.0 - *
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Export to ZIP

Export your mails and folders to a zip file!

Rated 2 out of 5 stars (13)
1,954 users
Works with Thunderbird 78.4.0 - *
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Search for

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

Rated 5 out of 5 stars (7)
1,538 users
Works with Thunderbird 77.0 - *
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Cypherdog Encryption

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

Not yet rated
38 users
Works with Thunderbird 78.0 - *
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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
80 users
Works with Thunderbird 102.0 - *
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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)
38 users
Works with Thunderbird 115.0 - *
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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)
339 users
Works with Thunderbird 78.0 - *
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Archive old messages

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

Not yet rated
474 users
Works with Thunderbird 78.0 - *
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Antispam

Sending email to the Antispam database

Not yet rated
20 users
Works with Thunderbird 128.0 - *
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SimpleLogin - Easy Reach

An extension for Thunderbird that allows you to access SimpleLogin.

Not yet rated
13 users
Works with Thunderbird 102.0 - *
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OWUI - Quick Access

This extension adds a simple button to your Spaces toolbar that opens in a new tab, providing you with one-click access to your Open WebUI Instance.

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4 users
Works with Thunderbird 106.0 - *
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Gemini Proofreader

This extension uses Gemini Flash 2.0 to proofread emails when the user clicks the extension icon.

Usage requires a Gemini API key. There is a free usage tier that should be more than adequate for almost every user.

Not yet rated
16 users
Works with Thunderbird 60.0 - *
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SpaceHey - Quick Access

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

Not yet rated
1 user
Works with Thunderbird 106.0 - *
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OpenAI Proofreader

This extension uses OpenAI gpt-4o-mini to proofread emails when the user clicks the extension icon.

Usage requires an OpenAI API key. OpenAI does not offer a free usage tier. Proofreading a 4-5 paragraph email costs a fraction of a cent.

Not yet rated
15 users
Works with Thunderbird 60.0 - *
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ThunderCalc

A simple calculator for Thunderbird/Sea Monkey/Firefox, available in a pop-up window or a separate tab.

Not yet rated
14 users
Works with Thunderbird 60.0 - *
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