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Blend In Requires Restart

Blends in 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 being used the most in the world. Thunderbird can also be blended in as Firefox.

Rated 4 out of 5 stars (10)
1,016 users
Updated June 14, 2017

WarnAttachment Requires Restart

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 (1)
69 users
Updated June 13, 2017

Custom Address Sidebar Requires Restart

Allow you to help address sidebar more useful.

Rated 4 out of 5 stars (7)
5,459 users
Updated June 13, 2017

dwMailCopy Requires Restart

This add-on is help for create the mail division. This add-on is converting to "(2/5)" from the string "(1/5)" in E-mail subject, after copy the mail. After now, Will be freed from onerous copy-paste work.

Not yet rated
192 users
Updated June 12, 2017

Enigmail Requires Restart Featured

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Rated 4 out of 5 stars (191)
161,052 users
Updated June 12, 2017

TORPEDO - TOoltip-poweRed Phishing Email DetectiOn Requires Restart

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 4 out of 5 stars (4)
1,315 users
Updated June 12, 2017

Great DANE Requires Restart

Retrieve DANE S/MIME Certificates for Encryption/Signing.

This extension enables users to automatically retrieve S/MIME certificates using the Great DANE Engine (https://github.com/grierforensics/Great-DANE-Engine).

Not yet rated
40 users
Updated June 12, 2017

Mail Merge Requires Restart Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (147)
62,263 users
Updated June 11, 2017

UnMHT

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 4 out of 5 stars (234)
97,224 users
Updated June 10, 2017

KeeFox Requires Restart

Simple and secure password management. Login automatically, never forget another password, stay in control of your passwords and improve their security. Powered by the world-renowned KeePass Password Safe.

Rated 5 out of 5 stars (1,101)
62,165 users
Updated June 10, 2017

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (10)
31,239 users
Updated June 8, 2017

Subject Manager Requires Restart

Manages subject of composed emails.

Rated 5 out of 5 stars (13)
2,720 users
Updated June 8, 2017

GNotifier

Add-on for Firefox and Thunderbird. Replaces built-in notifications with the OS native notifications. It supports most Linux Desktop Environments, Windows 8.1 & 10.

Rated 5 out of 5 stars (34)
13,340 users
Updated June 8, 2017

mms Auto Correct Requires Restart

AutoCorrect for the Compose window.

Rated 3 out of 5 stars (31)
836 users
Updated June 7, 2017

Adblock Plus Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (5,330)
16,577,184 users
Updated June 7, 2017

Get Selected Mails Requires Restart

Gets new messages for selected mail accounts.

Rated 5 out of 5 stars (10)
939 users
Updated June 7, 2017

S3.Google Translator Requires Restart

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

New Feature: Language learning!

Rated 5 out of 5 stars (371)
361,717 users
Updated June 3, 2017

Personal Level Indicators Requires Restart

Shows an indicator so you can tell if an email was addressed only to you (»), a group (›), or a mailing list.

Rated 4 out of 5 stars (11)
2,876 users
Updated June 2, 2017

One-by-One Forward Requires Restart

Highlight multiple emails, right-click, then select "One-by-One Forward". This extension will allow you to forward the selected emails, one-by-one, to the recipients you specify using your choice of attachment handling.

Not yet rated
13 users
Updated June 1, 2017

MultiTemplateLoader Requires Restart

Manages & applies multiple HTML templates when creating/replying messages.

Templates may be either local files or online links (http:// or ftp://). Up to 9 templates can be defined and easily switched, also using shortcut keys.

Not yet rated
280 users
Updated June 1, 2017