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Ollama Summarizer

This add-on summarizes all new emails with a locally hosted LLM exposed via Ollama and sends the summary as a new message. The email address that the summary is sent to must be configured in the add-on settings. Ollama must also be installed locally.

Not yet rated
24 users
Updated June 25, 2025

ReplyAgent

Extension for ai generated replys for users emails.

Rated 5 out of 5 stars (1)
2 users
Updated June 25, 2025

Strikethrough Button

Adds a strikethrough toggle button to the Thunderbird compose toolbar. As this is an extension, it is not an integrated component of the Thunderbird toolbar. That is why it sits at the far right on the toolbar and not next to the B/I/U buttons.

Not yet rated
5 users
Updated June 24, 2025

Link Check

フィッシングメールの対策として
主に、メール内のリンク先のドメインをチェックし、
安全性を確認する。

Check the domain of the link in the email.

Not yet rated
4 users
Updated June 24, 2025

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 (213)
42,394 users
Updated June 24, 2025

Thunderbird Send [stage]

[Alpha Testing] Thunderbird send allows sending and receiving end to end encrypted files.

This add-on is undergoing testing and not yet available to the general public.

Rated 1 out of 5 stars (1)
27 users
Updated June 23, 2025

ChartPop

Stop opening new tabs! Instantly see stock prices and mini charts by hovering over tickers on any webpage.

Not yet rated
1 user
Updated June 23, 2025

PhishNet

AI phishing detection tool

Rated 4 out of 5 stars (1)
5 users
Updated June 23, 2025

SubSwitch

Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.

Rated 4 out of 5 stars (17)
418 users
Updated June 23, 2025

Quick Folder Move

When filing messages, a search box will show up allowing you to quickly enter the folder name you want to move to.

If no search term is entered, a list of recent folders will show up instead.

Rated 4 out of 5 stars (209)
7,291 users
Updated June 23, 2025

Auto Profile Picture

Upgrade your Thunderbird experience with intelligent and clearer sender visualization that transforms how you identify and manage emails — making email management smoother and more intuitive.

Rated 4 out of 5 stars (19)
741 users
Updated June 23, 2025

Nostalgy++/ Manage, search and archive emails

Shortcuts to move/copy/archive messages, with folder name completion.
Rules for moving messages to folders.
Automatic rules by statistical observation/ by folder of conversation/thread.
Search dialog in a tab, with message display /folder tree.

Rated 5 out of 5 stars (79)
3,416 users
Updated June 23, 2025

Text Insert: Templates/Instant Spell Check

Email composer:

*Upper case the first letter of nouns, names, or words at sentence start
*Android(TM) like spellcheck/suggest alternatives (DE, EN, ES, FR,NL)
*Insert styled text, images, tables with shortcuts
*Define shortcut-replacements.

Rated 3 out of 5 stars (7)
214 users
Updated June 23, 2025

StandardTexter

With the help of this Add-on, up to 99 pre-made texts (standard texts, text modules or even signatures) can be stored, which can then be retrieved and inserted when writing an e-mail.
The texts can be preformatted with HTML.

Rated 4 out of 5 stars (16)
2,330 users
Updated June 19, 2025

ImportExportTools NG

Adds tools to import/export messages and folders

EML, MBOX, HTML PDF , Plaintext Support and CSV support with indexes and file naming.

Rated 4 out of 5 stars (237)
253,514 users
Updated June 18, 2025

ThunderAI Sparks

ThunderAI Sparks is an add-on designed to add advanced features to ThunderAI.

Not yet rated
318 users
Updated June 18, 2025

Seams

Seams provides some integration with Patchwork, the patch tracking system. It makes the patch state visible directly from Thunderbird. It also displays useful links to a Patchwork instance or to mail archives, and commands to apply the patch locally.

Rated 5 out of 5 stars (2)
28 users
Updated June 18, 2025

Email Original

El sello que permitirá a tus destinatarios de tus correos electrónicos, validar la autenticidad y legitimidad de tus direcciones de correo electrónico, poniendo esa necesaria barrera a las posibles suplantaciones de identidad (phishing ó spoofing).

Not yet rated
0 users
Updated June 18, 2025

ObsidianClipper

ObsidianClipper is a Thunderbird extension to clip emails to the Obsidian notetaking application. Save an email to Obsidian seamlessly with one click. Customize the format of new note titles and note layout.

Rated 5 out of 5 stars (8)
995 users
Updated June 18, 2025

selectAll Button

This Add-on installs a button on the mail toolbar that will when clicked select all messages within the folder.

Not yet rated
140 users
Updated June 18, 2025