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*cloud - FileLink for Nextcloud and ownCloud Featured

Upload large attachments to your Cloud and send the link by email

Rated 5 out of 5 stars (55)
38,200 users
Updated July 11, 2025

WarnAttachment

WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.

Rated 5 out of 5 stars (13)
2,869 users
Updated July 10, 2025

Sales force weblink

Add-on for Thunderbird to open Sales force website in a Tab.

Not yet rated
2 users
Updated July 10, 2025

Attach from Clipboard

Create file attachments directly from the system clipboard.

Rated 4 out of 5 stars (33)
6,029 users
Updated July 9, 2025

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
17 users
Updated July 9, 2025

OpenDetachedAttachments

Allows opening of detached attachments if they have been moved

Not yet rated
0 users
Updated July 9, 2025

Retrieve Remote Avatar

This experimental addon for Thunderbird fetches a remote avatar from various sources if one isn't already set.

By default this addon pulls from libravatar and gravatar. Custom providers can also be set.

Not yet rated
2 users
Updated July 9, 2025

SPAMBEE

Report any unsollicited email (SPAM, Phishing, ...) to SPAMBEE.
Get an alert if you open an email containing a URL already known as fraudulent.
All reports are anonymized, no registration is required.

Rated 4 out of 5 stars (6)
1,594 users
Updated July 9, 2025

Signal Spam

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

Rated 2 out of 5 stars (184)
15,487 users
Updated July 9, 2025

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)
247 users
Updated July 9, 2025

QNote

Add sticky notes to your emails with this feature-rich, drop-in replacement for the XNote++ extension.

Rated 5 out of 5 stars (66)
6,658 users
Updated July 9, 2025

cb_thunderlink

cb_thunderlink is a thunderlink replacement.
Clickable, durable links to specific messages inside Thunderbird.

Rated 5 out of 5 stars (8)
163 users
Updated July 9, 2025

Simple Mail Redirection

Allows you to resend (also known as redirect) email messages.
Uses 'cardbook' if installed

Bases on the add-on 'Mail Redirect' by Onno Ekker and Pawel Krzesniak

Please see the support page on how to use and why it sometimes does not work!

Rated 5 out of 5 stars (38)
9,311 users
Updated July 9, 2025

CardBook Featured

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon

Rated 4 out of 5 stars (491)
66,925 users
Updated July 9, 2025

Thunderbird Send

[IMPORTANT] This is a pre-release version Thunderbird Send. We will gradually open it for beta testing.
This add-on is built and maintained by your friends at Thunderbird.
Stay tuned to updates on thunderbird.net

Not yet rated
55 users
Updated July 8, 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)
28 users
Updated July 8, 2025

Thunderbird Vericode

Automatically detects verification codes in received emails and displays a notification that you can click to copy the code to clipboard.

Rated 5 out of 5 stars (2)
12 users
Updated July 8, 2025

Interstellar Alliance Social Experiment Step 3

Send the Interstellar Alliance Social Experiment Step 3 letter as an email to a predefined online list of recipients.

Not yet rated
2 users
Updated July 7, 2025

PrioMailbox

PrioMailbox helps you prioritize your Thunderbird inbox by automatically tagging and highlighting important emails. Trainable tags organize your inbox efficiently, saving time and reducing distractions, with a simple, user-friendly interface.

Not yet rated
155 users
Updated July 6, 2025

Logout

This extension adds "Logout" to the folders/accounts context menu.

After you "Logout" you will be asked again for passwords for this account (incoming and outgoing) without the need to restart thunderbird.

Rated 5 out of 5 stars (1)
193 users
Updated July 5, 2025