Privacy and Security

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Clear IMAP Local Cache Requires Restart

Clears IMAP local cache on startup.

Rated 5 out of 5 stars (1)
777 users
Added February 18, 2014

Flex Confirm Mail Requires Restart

Confirm mail address and attachments based on flexible rules.

Rated 1 out of 5 stars (1)
13,212 users
Added February 18, 2014

ToggleFullHeaders Requires Restart

Allows you to customise the message panel buttons to add a "Toggle Headers" button that will switch between showing and hiding the full headers.

Rated 1 out of 5 stars (1)
92 users
Added February 9, 2014

CookieKeeper

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (70)
14,682 users
Added January 22, 2014

Secure Addressing Requires Restart

This add-on provides features to avoid sending emails to wrong addresses. Key features are a confirmation window of recipient's addresses upon sending, name and affiliation look up at mail composition and main windows, and safe auto completion.

Rated 5 out of 5 stars (20)
3,427 users
Added January 11, 2014

Extensor

Quick access to add-on functions from a toolbar panel: Options, (De)Activate, Details, Home page, Review page, Donation page, Uninstall, Restart application.

Rated 5 out of 5 stars (3)
223 users
Added December 11, 2013

Bitmask Thunderbird Extension Requires Restart

After installing the extension, do the following:

1. Make sure that Bitmask is running and you are logged in.
2. In Thunderbird, click the main menu, then "Preferences" - "Account Settings".
3. Click "Account Actions" - "New Bitmask Account...".

Rated 3 out of 5 stars (1)
277 users
Added October 31, 2013

Highlight External Addresses Requires Restart

This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.

Rated 4 out of 5 stars (1)
314 users
Added October 29, 2013

Massey Omura Cryptosystem Requires Restart

Add On Keamanan EMail dengan Massey Omura Cryptosystem

Not yet rated
1 user
Added August 20, 2013

Channel Guard Requires Restart

Channelguard disables plugins and protocol handlers to ensure maximum security against side-channel attack.

Rated 4 out of 5 stars (2)
50 users
Added August 16, 2013

DL for Thunderbird Requires Restart

Allows to convert large attachments to links automatically without 3rd party providers.

Rated 5 out of 5 stars (4)
1,973 users
Added July 9, 2013

Paranoia Requires Restart

Check if your emails arrived TLS-encrypted (and which corporations were able to read it nevertheless)

Rated 4 out of 5 stars (8)
1,073 users
Added July 2, 2013

Bluhell Firewall

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

Rated 4 out of 5 stars (359)
90,491 users
Added May 24, 2013

DKIM Verifier Requires Restart

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (15)
5,128 users
Added May 13, 2013

Enigma-code Requires Restart

Proste i szybkie szyfrowanie korespondencji e-mail, jak i dowolnego tekstu. Algorytm szyfrowania oparty na sposobie szyfrowania maszyny Enigma.

Not yet rated
10 users
Added April 2, 2013

Close Proxy Authentication Requires Restart

Provides transparent proxy authentication on your enterprise network.
Close authentication dialog if login on proxy failed.

Rated 5 out of 5 stars (4)
1,510 users
Added March 20, 2013

CapsKiller Requires Restart

Caps Killer is a protection against newbies using caps in their mails.

Rated 5 out of 5 stars (2)
66 users
Added February 23, 2013

GNOME keyring password integration Requires Restart

Extension that allows Firefox and Thunderbird to store passwords in Keyring, Gnome's default password store.

Rated 3 out of 5 stars (16)
431 users
Added January 17, 2013

Too Many Recipients Requires Restart

Contourne la limite du nombre de destinataires/e-mail des serveurs SMTP.
Gets around the limit on the number of recipients/e-mail of SMTP servers.
Evita la limitación de número de destinatarios/e-mail del servidor SMTP.

Rated 3 out of 5 stars (18)
1,868 users
Added December 13, 2012

Encrypt if possible Requires Restart

Sets message security option "encrypt message", if valid X509 certificates are found for all recipients.

Rated 5 out of 5 stars (17)
1,835 users
Added October 15, 2012