Privacy and Security

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CapsKiller Requires Restart

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

Rated 5 out of 5 stars (2)
37 users

Key Manager Requires Restart

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

Rated 3 out of 5 stars (21)
46 users

ThunderBayes Requires Restart

SpamBayes integration for Thunderbird - a better spam filter.

Rated 3 out of 5 stars (15)
2 users

Mailsleuth Requires Restart

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)
517 users

ShowIP Requires Restart

Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.

Rated 3 out of 5 stars (280)
18,222 users

AlertSwitch Requires Restart

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

Rated 4 out of 5 stars (3)
556 users

InfoNotary Configurator for Mozilla Requires Restart

Configures Mozilla for work with certificates issued by InfoNotary Plc.

Rated 4 out of 5 stars (3)
2,708 users

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)
31 users

External Email Alert Requires Restart

Alerts user to confirm that it is ok to send an external email.

Rated 3 out of 5 stars (6)
195 users

Card Viewer Extended Requires Restart

Adds a button in address book cards to fetch and display the certificate of a contact.

Rated 5 out of 5 stars (1)
0 users

Clear IMAP Local Cache Requires Restart

Clears IMAP local cache on startup.

Rated 5 out of 5 stars (1)
478 users

MDN Extended Requires Restart

Allows the recipient of a message to send a return receipt (MDN: Message Disposition Notification) on message deletion. This addon is usefull for better experience with Notification Viewer addon.

Rated 5 out of 5 stars (1)
4 users

Logout Requires Restart

This extension adds "Logout" to the folders context menu.
After you "Logout" you will be asked again for passwords for this account (incoming and outgoing).

Rated 5 out of 5 stars (1)
68 users

Auto Password Registerer Requires Restart

Registers given passwords to Firefox/Thunderbird's password manager automatically.

Rated 5 out of 5 stars (1)
35 users

Force Authentication at Startup. Requires Restart

Always ask password and hide UI at the startup.

Rated 5 out of 5 stars (1)
14 users

WebPG for Mozilla Requires Restart

An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey

Rated 3 out of 5 stars (24)
854 users

Signal Spam Requires Restart

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 3 out of 5 stars (36)
9,441 users

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)
129 users

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 (2)
236 users

SecondOpinion Requires Restart

This extension implements a convenient way to check and upload attachments against VirusTotal.com

Rated 4 out of 5 stars (2)
234 users