Privacy and Security

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Viral Threat Level

Adds an image to the status bar indicating the current threat level of the internet. It allows quick access to security information that you can use to help protect yourself, and links to antivirus software comparisons and security extensions.

Rated 4 out of 5 stars (22)
1,062 users

Key Manager

KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation

Rated 3 out of 5 stars (21)
997 users

Paranoia

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

Rated 4 out of 5 stars (6)
953 users

Sender Verification Anti-Phishing Extension

Protects you from phishing attacks by verifying the From: address domain name of emails as you read them. Sender Policy Framework (SPF) and DNS-based reputation lists are used.

Rated 4 out of 5 stars (20)
929 users

Fingerfox (SE)

Use MS Fingerprint Reader with Firefox and Thunderbird...

Rated 4 out of 5 stars (12)
857 users

AlertSwitch

Turn on/off the alert shown when new message arrives.

Rated 4 out of 5 stars (3)
797 users

Mailsleuth

Mailsleuth is a add-on for Thunderbird that provides you a full email header analysis of any email in your Inbox. This add-on is designed to provide a report on the email headers on any email you choose from your inbox. MAJOR updates for Feb 2013!

Rated 3 out of 5 stars (7)
778 users

Export All Certificates

Adds an option to export all root certificates.

Rated 3 out of 5 stars (2)
734 users

Disable about:config

Disable about:config feature of Firefox and Thunderbird.

Rated 1 out of 5 stars (1)
685 users

View Your Certificates Email Address No Restart

Adds a column for displaying the certificates Email address to the "Your Certificates" tab of the Certificate Manager

Rated 5 out of 5 stars (4)
662 users

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)
634 users

abusix Spam reporter

The abusix Spam Reporter enables you to forward and report spam to the abusix blackhole.mx systems directly from Thunderbird (free of charge). Thus, you help professionals and security vendors to fight spam much more effectively at the source.

Rated 4 out of 5 stars (8)
578 users

MailSentry IronPort Spam Reporter

Report spam and ham to IronPort - originally written for our MailSentry hosted IronPort customers, it can be used by anyone who has their email filtered by an IronPort appliance.

Rated 5 out of 5 stars (2)
559 users

Clear IMAP Local Cache

Clears IMAP local cache on startup.

Rated 5 out of 5 stars (1)
550 users

Lock The Text

Encrypt your text data in browser before you submit it to a network

Rated 5 out of 5 stars (11)
533 users

GNOME keyring password integration

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

Rated 3 out of 5 stars (17)
519 users

KDE5 Wallet password integration

This extension enable passwords and form logins to be stored in KDE5 Wallet

Rated 5 out of 5 stars (4)
500 users

Disable About Something

Provides ability to disable "about:*" pages by the configuration.

Rated 5 out of 5 stars (1)
453 users

ThunderBayes

SpamBayes integration for Thunderbird - a better spam filter.

Rated 3 out of 5 stars (16)
445 users

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!

Rated 1 out of 5 stars (1)
430 users