Privacy and Security

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Correct Identity

Ever sent mail from the wrong email address because you forgot to select the correct identity in the compose window?

Rated 4 out of 5 stars (80)
7,165 users
Updated June 24, 2015

DKIM Verifier

Verifies the DKIM-Signature of an e-mail.

Rated 5 out of 5 stars (9)
2,883 users
Updated June 21, 2015

Identity Chooser

Identity Chooser helps you to always use the correct identity when composing a new email.

Rated 5 out of 5 stars (90)
9,411 users
Updated June 19, 2015

Cert Importer

Imports certs automatically.

Not yet rated
361 users
Updated June 12, 2015

Clear IMAP Local Cache

Clears IMAP local cache on startup.

Rated 5 out of 5 stars (1)
331 users
Updated June 11, 2015

Disable Addons

Disable Addons.

Rated 2 out of 5 stars (1)
6 users
Updated June 10, 2015

Copy Folder

The missing Thunderbird "copy folder" feature! Copy folders or entire POP/IMAP accounts recursively to any location while maintaining folder structure.

Rated 3 out of 5 stars (30)
10,112 users
Updated June 9, 2015

FoxyProxy Basic

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (29)
27,766 users
Updated May 29, 2015

Password Exporter No Restart

This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Rated 4 out of 5 stars (313)
189,666 users
Updated May 20, 2015

Blend In

Blends OS-related values in User-Agent HTTP request header & a number of JS properties, so that Firefox (Thunderbird) appears to sites visited as running on the OS used the most in the world. Thunderbird can also be blended in as Firefox.

Rated 4 out of 5 stars (9)
929 users
Updated May 19, 2015

B-Trust Smart Card Certificate

Configures B-Trust security device, imports B-Trust certification chains and warns user that operation is unrecoverable, if he clicks delete certificate option for B-Trust certificate.
Designed by Borica - Bankservice Plc.

Rated 5 out of 5 stars (1)
11,898 users
Updated May 17, 2015

Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (133)
51,666 users
Updated May 7, 2015

KeePass Helper

Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.

Rated 4 out of 5 stars (33)
4,222 users
Updated May 4, 2015

Saved Password Editor

Adds the ability to create and edit entries in the password manager.

Rated 5 out of 5 stars (200)
94,975 users
Updated April 30, 2015

Check Domain

This extension is to display the warning dialog when you send mail for multiple domains.

Rated 4 out of 5 stars (4)
2,273 users
Updated April 22, 2015

Enigmail Featured

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Rated 4 out of 5 stars (179)
162,398 users
Updated April 18, 2015

ThunderSec

ThunderSec is a security extension that provides several pieces of additional security functionality, including DNS-based Blackhole List (DNSBL), Realtime Blackhole Lists (RBL), DomainKeys Identified Mail (DKIM) and Sender Policy Framework (SPF).

Not yet rated
57 users
Updated April 15, 2015

CookieFast

A small ergonomic 1-click cookie manager.

Rated 4 out of 5 stars (9)
410 users
Updated April 14, 2015

Force Authentication at Startup.

Always ask password and hide UI at the startup.

Not yet rated
5 users
Updated April 14, 2015

clamdrib LIN

"clamdrib LIN" ist wie der Name schon sagt die Weiterentwicklung des Add-on clamdrib, allerdings nur noch für Linux. Sämtliche E-Mails, Feeds und News werden auf Viren und anderes Ungeziefer geprüft und gemeldet. Gelöscht wird hierbei jedoch nichts!

Not yet rated
148 users
Updated April 12, 2015