Privacy and Security

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Secure Addressing

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 (10)
1,368 users

Check Domain

This extension is to display the warning dialog when you send mail for multiple domains.

Rated 4 out of 5 stars (4)
1,993 users

Pan No Restart

Block ads and manage proxy.

Rated 5 out of 5 stars (52)
2,188 users

Confirm-Address

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (26)
43,159 users

confirm-mail

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 (5)
2,696 users

CryptoData

Easily and quickly to encrypt / decrypt
For users: private messages via e-mail, blogs, social networks, forums, etc.
For webmasters: websites, images, photos, etc.
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (4)
1,116 users

Check and Send

Check the message contents and addresses before you send the message...

Rated 4 out of 5 stars (25)
23,520 users

Yet Another Remove It Permanently

Remove elements and block content on Web pages.

Rated 4 out of 5 stars (37)
2,012 users

Auto Address Cleaner

Removes comment, display name automatically from addresses before sending mail.

Rated 5 out of 5 stars (45)
15,089 users

Purge Events

Purge events from Sunbird and Lightning calendars

Rated 2 out of 5 stars (6)
161 users

Blend In

Blends OS-related values in User-Agent HTTP request header & a number of JS properties, so that Firefox (Thunderbird) appears to sites visited as running on the OS used the most in the world. Thunderbird can also be blended in as Firefox.

Rated 4 out of 5 stars (9)
906 users

Channel Guard

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

Rated 4 out of 5 stars (2)
54 users

enMailing for Thunderbird

Encrypted email made easy.

Not yet rated
2 users

S/MIME Security for Multiple Identities

Adds S/MIME Security configuration to the multiple identities dialog.
Meanwhile this feater has been integrated into Thunderbird 3

Rated 5 out of 5 stars (7)
41 users

my site 1.0 No Restart

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

Rated 1 out of 5 stars (1)
9 users

Massey Omura Cryptosystem

Add On Keamanan EMail dengan Massey Omura Cryptosystem

Not yet rated
1 user

Sender Address Columns

Adds optional columns to the Thread Pane to allow sorting email messages by:
* Sender address -- e.g. "someone@example.com"
* Sender address domain -- e.g. "example.com"
* Sender address local part -- e.g. "someone"

Rated 5 out of 5 stars (1)
65 users

privateID

This extension displays a warning if you send a message from your private emailID to an address/ mailing list which is not found in your Personal Address Book...

Rated 3 out of 5 stars (6)
69 users

A Better S/MIME GUI

Provides a better S/MIME GUI for Thunderbird.

Rated 3 out of 5 stars (2)
6 users

Highlight External Addresses

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)
105 users