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WarnAttachment

WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.

Rated 5 out of 5 stars (8)
2,276 users

StartupMaster

Asks for the master password at startup (fixes multiple password prompt)

Rated 4 out of 5 stars (307)
1,095 users

KDE5 Wallet password integration Requires Restart

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

Rated 4 out of 5 stars (29)
0 users

my site 1.0

it allow to browse facebook - youtube and gmail in secured way...

Rated 1 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)
43 users

FileLink provider for Send

Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).

Not yet rated
0 users

CapsKiller Requires Restart

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

Rated 5 out of 5 stars (2)
0 users

Yet Another Remove It Permanently Requires Restart

Remove elements and block content on Web pages.

Rated 5 out of 5 stars (47)
1 user

Password Exporter

This add-on allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Note: This add-on won't work in Firefox 57. It may eventually if the APIs to access passwords are implemented.

Rated 4 out of 5 stars (551)
275 users

Disable Signature Requires Restart

Allows to disable the S/MIME signature of messages. Afterwards, these messages are no longer recognized as signed and their attachments can be deleted or detached.

Rated 5 out of 5 stars (1)
3 users

Logout

This extension adds "Logout" to the folders/accounts context menu.

After you "Logout" you will be asked again for passwords for this account (incoming and outgoing) without the need to restart thunderbird.

Rated 5 out of 5 stars (1)
115 users

confirm-mail Requires Restart

メール送信前に宛先メールアドレスと添付ファイル名を確認することができるアドオンです。

Rated 3 out of 5 stars (4)
90 users

CookieKeeper

Extended Cookie Manager - Keep only wanted cookies.

Rated 4 out of 5 stars (80)
76 users

Keychain Services Integration Requires Restart

Store usernames and passwords in your Mac OS X Keychain.

Rated 4 out of 5 stars (92)
2 users

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 (23)
107 users

Show Password On Input Requires Restart

Gives an option to show the master password on input

Rated 4 out of 5 stars (11)
26 users

Habu Requires Restart

*This extension was formerly known as Okopipi*

Please be sure to visit the homepage and forums to provide your input for the future of Habu.

Support can be found at http://forums.mosinu.com/viewforum.php?f=5

Rated 4 out of 5 stars (18)
0 users

Autocrypt Requires Restart

E-Mail encryption that gets out of your way. Compatible with Autocrypt and OpenPGP.

EARLY ACCESS, MAY CONTAIN BUGS!

Caution: This extension can not be used together with Enigmail. Please remove Enigmail before installing.

Rated 4 out of 5 stars (10)
20 users

TORPEDO - TOoltip-poweRed Phishing Email DetectiOn

TORPEDO ist ein Tool zum Erkennen von betrügerischen Links (Phishing). Bewegen Sie die Maus über einen Link in einer Email. TORPEDO zeigt Ihnen die tatsächliche Webadresse in einem Tooltip an und hilft Ihnen, diese zu untersuchen.

Rated 5 out of 5 stars (9)
346 users

TorBirdy Requires Restart

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

Rated 4 out of 5 stars (14)
62 users