Privacy and Security
CapsKiller Requires Restart
Caps Killer is a protection against newbies using caps in their mails.
Key Manager Requires Restart
KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation
ThunderBayes Requires Restart
SpamBayes integration for Thunderbird - a better spam filter.
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!
AlertSwitch Requires Restart
Turn on/off the alert shown when new message arrives.
Channel Guard Requires Restart
Channelguard disables plugins and protocol handlers to ensure maximum security against side-channel attack.
External Email Alert Requires Restart
Alerts user to confirm that it is ok to send an external email.
Clear IMAP Local Cache Requires Restart
Clears IMAP local cache on startup.
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).
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.
Card Viewer Extended Requires Restart
Adds a button in address book cards to fetch and display the certificate of a contact.
Auto Password Registerer Requires Restart
Registers given passwords to Firefox/Thunderbird's password manager automatically.
Force Authentication at Startup. Requires Restart
Always ask password and hide UI at the startup.
WebPG for Mozilla Requires Restart
An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey
Decide whether to allow or block remote content in messages by comparing the names of the folders in which they are located to configured regular expressions.
Check Attachment before Send Requires Restart
Confirms to send a mail with any attachment.
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).
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
GNOME keyring password integration Requires Restart
Extension that allows Firefox and Thunderbird to store passwords in Keyring, Gnome's default password store.
Do Not Save Password Requires Restart
Prevents to save passwords.