Privacy and Security

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Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (133)
47,303 users
Updated April 19, 2015

Enigmail Featured

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Rated 4 out of 5 stars (179)
155,174 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
14 users
Updated April 15, 2015

Sticky Password Autofill Engine for Windows

Autofill web-pages with stored passwords in Sticky Password for Windows

Not yet rated
35 users
Updated April 14, 2015

CookieFast

A small ergonomic 1-click cookie manager.

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

Force Authentication at Startup.

Always ask password and hide UI at the startup.

Not yet rated
1 user
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
66 users
Updated April 12, 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 (27)
28,757 users
Updated April 8, 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. Since 18.0t17.0.2 Windows is blended in by default too.

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

Bluhell Firewall No Restart

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

Rated 5 out of 5 stars (219)
143,698 users
Updated April 3, 2015

Adblock Plus No Restart Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,833)
21,370,353 users
Updated March 31, 2015

CookieKeeper No Restart

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (35)
12,971 users
Updated March 31, 2015

Adblock Edge No Restart

Adblock Edge is a fork of the Adblock Plus version 2.1.2 extension for blocking advertisements on the web, without sponsored ads whitelist.

**This addon will be discontinued on June 2015**

Rated 5 out of 5 stars (259)
811,523 users
Updated March 28, 2015

DKIM Verifier

Verifies the DKIM-Signature of an e-mail.

Rated 5 out of 5 stars (8)
2,591 users
Updated March 21, 2015

Pan No Restart

Block ads and manage proxy.

Rated 5 out of 5 stars (38)
1,332 users
Updated March 16, 2015

TorBirdy

This extension configures Thunderbird to make connections over the Tor anonymity network.

Rated 5 out of 5 stars (5)
2,170 users
Updated March 12, 2015

IsAdmin

Shows whether the application is running with admin privileges, using an icon in the status bar; useful if logged in as an administrator and you use privilege limitation tools such as DropMyRights, RunAs or Windows User Account Control.

Rated 5 out of 5 stars (10)
873 users
Updated March 10, 2015

Saved Password Editor

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

Rated 5 out of 5 stars (190)
94,202 users
Updated February 7, 2015

InfoNotary Configurator for Mozilla

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 5 out of 5 stars (2)
10,248 users
Updated January 25, 2015

Silent Block

Minimum and fast URL blocker by regular expression.

Rated 5 out of 5 stars (17)
11,848 users
Updated January 24, 2015