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AutoBucket

This is an extension function that classifies emails into multiple buckets using AI(the Bayesian filter) and tags them.

Rated 3 out of 5 stars (14)
131 users

Lojban spell check dictionary

Spell check dictionary for Lojban.

Not yet rated
2 users

Night and Day Dynamic

A theme that switches between sun and moon based on time of day.

This is the canonical example dynamic theme published by Mozilla: https://github.com/mdn/webextensions-examples/tree/master/dynamic-theme

Rated 3 out of 5 stars (2)
924 users

Malay (ms) Language Pack

Malay (ms) Language Pack

Not yet rated
13,847 users

Dark Reader

Dark mode for every email. Take care of your eyes, use dark theme for night and daily messaging.

Rated 4 out of 5 stars (45)
10,736 users

Next Unread Group (Mark All Read)

Adds a Group button, marks current newsgroup or folder as read and moves to the next unread message

Rated 5 out of 5 stars (3)
136 users

Tomba : Email Finder

Data to power your entire business, with just one click.

Not yet rated
27 users

Zivver for Thunderbird

This extension automatically detects Zivver messages and decrypts them on-the-fly using the Zivver API. Messages are decrypted only when actively displayed by the user and are never stored locally.

Not yet rated
10 users

Simple Startup Minimizer

This extension will minimize Thunderbird on startup, it is very simple and I didn't put much work into it but it should work on all platforms. Please let me know if you want more features added into it.

Rated 4 out of 5 stars (31)
7,409 users

Smileyfixer

Fixes smileys that show in emails created by Outlook as J.

Rated 5 out of 5 stars (4)
925 users

Add contact to CC by mentioning in body with @

Use @ to mention somebody on an email to link and add to the CC.

Rated 2 out of 5 stars (5)
317 users

Mark GMail Read

Automatically marks all messages in [Gmail] folder as read.

Rated 5 out of 5 stars (1)
119 users

EagleCloud Extension

Works along with EagleCloud Information Security product to secure sensitive information based on company policy.

Not yet rated
2 users

ThunderFWD

Encaminhe múltiplos e-mails de uma só vez.

Not yet rated
14 users

Conscious ClickUp Save

Conscious ClickUp Thunderbird add-on is a extension that gives support to send/archive mails from Thunderbird to ClickUp project management platform (https://clickup.com/)
For more info: https://github.com/Ruvin/Conscious-ClickUp-Thunderbird-Plugin

Rated 4 out of 5 stars (3)
57 users

ProtonMail Encryption Status

When using ProtonMail Bridge to integrate Mozilla Thunderbird withProtonMail, it's not easy to tell which emails were end-to-end (E2E) encrypted. This add-on puts an icon in the toolbar above every message to show you its encryption status.

Rated 5 out of 5 stars (6)
685 users

EnhancedReplyHeaders

Customizable headers for Thunderbird

Rated 4 out of 5 stars (6)
198 users

White Screen

Use white screen test to detect dead pixels, stuck pixels, and other display defects.

Not yet rated
13 users

Black Screen

Use black screen test to detect dead pixels, stuck pixels, and other display defects.

Not yet rated
27 users

WhatsApp - Thunderbird

Adds browser action icon to toolbar to open WhatsApp.

Rated 1 out of 5 stars (1)
212 users