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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)
231 users

Next Unread Thread (Mark All Read)

Adds a Thread button, marks current thread or conversation as read and moves to the next unread message

Rated 5 out of 5 stars (4)
125 users

Spam Scores

Displays spam scores according to mail headers. Supports spam/ham score headers of Rspamd, SpamAssassin and MailScanner. The add-on adds a column with the overall spam score to the mail list view and shows details of any matched spam/ham rule.

Rated 4 out of 5 stars (18)
1,873 users

Arcus

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

Rated 5 out of 5 stars (2)
17 users

New Tab

It's Open New Tab Within ThunderBird

Rated 5 out of 5 stars (4)
110 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
10 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)
5,285 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
39 users

Spellchecker Rumauntsch Puter

Spellchecker for Rumauntsch Puter

Not yet rated
3 users

Spellchecker Rumantsch Vallader

Spellchecker for Rumantsch Vallader

Not yet rated
5 users

Slack - Quick Access

Quick Access to Slack 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)
222 users

Open Google Chat

Adds an icon on the spaces toolbar to quickly open Google Chat.

Not affiliated with Google.

Rated 5 out of 5 stars (1)
412 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
16 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)
1,300 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)
172 users

ThunderbirdBravoClick2Call

Make a call to the selected phone number. Call the public numbers shown on the site via the BRAVO UCC SOLUTION platform by clicking or highlighting them

Not yet rated
1 user

MyTickets

Extension to mails that have TicketID: XXXX in Subject
It will Check to see if you have a "MyFolders" folder under your INBOX.
If yes it will create two child folders:
- Open
- Closed
IT will sync All Open Folder every 5 minutes

Not yet rated
15 users

Check before sending email

Before sending an e-mail, a pop-up window clearly displays check items such as the destination address, body text, and attached files, prompting the sender to confirm before sending the e-mail.

Not yet rated
395 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)
250 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