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10ten Japanese Reader (Rikaichamp)

Look up Japanese words with the hover of a mouse.

After enabling the add-on from the toolbar (or press Alt+R) simply hover over Japanese text and a popup displays corresponding dictionary definitions.

Rated 5 out of 5 stars (4)
230 users

New Tab

It's Open New Tab Within ThunderBird

Rated 5 out of 5 stars (4)
106 users

Skiff Mail

Integrates a Skiff Mail button into the Spaces toolbar. It opens the Skiff Mail website in a new tab.

Not yet rated
11 users

Telegram - Quick Access

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

Rated 5 out of 5 stars (2)
179 users

Google Calendar - Quick Access

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

Rated 5 out of 5 stars (1)
1,414 users

Bard - Quick Access

Quick Access to Google Bard (new name Gemini) in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Not yet rated
19 users

Arcus

Modern encryption in Thunderbird - powered by Rust, rage and WebAssembly

Rated 5 out of 5 stars (2)
18 users

Inoreader Thunderbird Add-on

A simple add-on with a button in the Spaces toolbar.

Requires an account a inoreader.com

Rated 3 out of 5 stars (1)
5 users

Toggle Dark Reader

Adds a Toggle Dark Reader button

Not yet rated
11 users

Daily Reports

This plugin lets you store different profiles with CC, To, Subject and Signature values. Perfect if you need to send emails with similar details often.

Not yet rated
4 users

SpaceApper

Add custom webpages to the spaces toolbar.

Not yet rated
55 users

Have I Been Pwned? - Easy Reach

An extension for Thunderbird that allows you to access Have I Been Pwned.

Not yet rated
9 users

HTML Source Editor

Allows to edit the source of the currently composed message. A simple alternative to ThunderHTMLedit.

Rated 5 out of 5 stars (13)
4,908 users

Dropbox Paper

How Does It Work?
Once you install the add-on, a new icon will appear in the Thunderbird toolbar. Simply click on the icon, and it will open the Dropbox Paper tab.

Will the Dropbox Paper Add-on Collect My Data?
Never.

Not yet rated
42 users

To must occur only once

This add-on changes all but the first "to" to "cc" if there are multiple "to" when replying to an email.

Rated 5 out of 5 stars (1)
25 users

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

Hawk (Like ChatGPT in your emails)

Hawk for Thunderbird is an AI-powered plugin designed to generate clear and personalized emails, translate content, fix grammar errors, and streamline your email communication workflow.

Rated 5 out of 5 stars (2)
289 users

Diola-Fogny spell checker Requires Restart

Diola-Fogny spell checker that recognizes about 19000 of the most common words.

Not yet rated
1 user

Diola-Kasa spell checker Requires Restart

Diola-Kasa spell checker that recognizes more than 16,000 common words.

Not yet rated
1 user

Oromo spellcheck Requires Restart

Oromo spell checker

Not yet rated
1 user