QuickOWL

Quickly Open Web Links using custom context menu with selected text as input

QuickOWL saves one's time in copying text from email and pasting in browser page to do some action or searching.

UrgentMail

Raise X11 urgent flag if new mail is received.

This addon listens for incoming mails and causes the Thunderbird window to draw attention.

RedThunderMineBird Plus

Provides ability to create issues on Redmine from the context menu or the button in the message header area.

Auto Mark As Read

Automatically mark incoming messages as read if they are in one of selected folders.
An attempt to revive & enhance 'Mark Junk Read' by Alex Cabal

Thunderbird OpenProject

Extension to add tasks to OpenProject

YouTube Video Downloader

The Complete Guide to YouTube Video Downloader Converter Tool and How They Can Help You Easily Download and Convert Videos from YouTube.

Empty Folder

Adds a keyboard action (Ctrl+Del) and a folder context menu to delete all messages in a folder. Has a confirmation dialog to prevent accidental deletions

KeepRunning

Once you close Thunderbird you will no longer be able to see your new emails. This plugin keeps Thunderbird active in the background, meaning you can still receive your new emails after closing the app. Use this when the app is in the startup.

Unsubscribe

Lightweight solution to simplify unsubscribing from newsletters

ConfirmConversionsAtSelecting

[Notification] : : As of June 21st 2021, automated browserAction popup was fixed.

Confirm conversions of e-mail to event and task at selecting thread tree children.

Glory be to God!

Thunderbird Todoist

Extension to add emails as tasks to Todoist.

YouTube RSS feed redesign

Adds YouTube thumbnails to RSS feed entries

Double Click Test

Google Mail Tab

Button to open Google Mail, supports multiple accounts. Useful if you need to configure mail settings, filters or forwarding in Gmail.

Webpage Print from Context Menu

Print the current webpage from the context menu

ThunderSearch

Open a Google search browser window in Thunderbird from the context menu

Crypto Price Tracker

Track the top 5 cryptocurrencies in real-time powered by simul8or

FileLink Provider for Dropbox

Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.

MyPhoneExplorer

This Addon is needed to sync your Android based smartphone with Thunderbird with the Software "MyPhoneExplorer". You can get MyPhoneExplorer from: https://www.fjsoft.at

Weatherlicious

A dynamic theme based on weather data from OpenWeatherMap.