Top-Rated Extensions

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Copy Plain Text 2 Requires Restart

Copies text without formatting

Rated 5 out of 5 stars (85)
29,811 users

QuickNote Requires Restart

A simple note-taking extension.

Rated 5 out of 5 stars (175)
22,252 users

Identity Chooser Requires Restart

Identity Chooser helps you to always use the correct identity when composing a new email.

Rated 5 out of 5 stars (90)
7,823 users

Nostalgy Requires Restart

Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.

Rated 5 out of 5 stars (143)
7,804 users

Password Tags Requires Restart

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (13)
1,322 users

GNotifier

Add-on for Thunderbird that replaces the built-in notifications with OS native ones. It supports most Linux Desktop Environments as well as Windows 8.1/10.

Rated 5 out of 5 stars (39)
10,562 users

Version in Add-on bar Requires Restart

Show the Firefox/Thunderbird version number in the addon bar (formerly called status bar).

Rated 5 out of 5 stars (10)
556 users

Stacked Inspector Requires Restart

Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.

Rated 5 out of 5 stars (10)
188 users

IMAP Received Date Requires Restart

Make the “Received” column in IMAP folders show when messages were actually received.

Rated 5 out of 5 stars (10)
1,964 users

Extension Auto-Installer

Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.

Rated 5 out of 5 stars (47)
1,961 users

No Message Pane Sort by Mouse Requires Restart

No Message Pane Sort prevents accidental resorting of the message pane by disabling mouse button clicks on the column headers.

It is still possible to sort messages by ctrl-clicking the header.

Rated 5 out of 5 stars (22)
1,822 users

Gnome Open Requires Restart

Open your mail attachments directly with your default gnome application.
ONLY for GNOME USERS!

Is Gnome Open still needed? Please read "Developer Comments" below.

Rated 5 out of 5 stars (17)
34 users

Preslovar Requires Restart

Ћирилично/латинично пресловљавање, виртуална ћирилична тастатура - Serbian Cyrillic/Latin transliteration and Virtual Cyrillic keyboard

Rated 5 out of 5 stars (12)
132 users

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (12)
27,803 users

Mail Summaries

Adds a summary of mail accounts and folders to replace the account central pane and the empty folder preview

Rated 5 out of 5 stars (39)
4,582 users

Dorando keyconfig Requires Restart

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) work again!

Rated 5 out of 5 stars (31)
9,555 users

NoiaButtons

The 'NoiaButtons' add-on offers cartoonish toolbar button icons (known from Noia themes) for default theme and lightweight themes. Further more lite silver and dark versions of Noia themes are included.

Rated 5 out of 5 stars (14)
14,316 users

Mail Merge Requires Restart Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (149)
55,847 users

Transliterator

As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.

Rated 5 out of 5 stars (75)
4,580 users

IranZilla Requires Restart

IranZilla provides the following services in Thunderbird:

* Adds a column in the mail view for displaying Iranian dates for each email.
* Supports both English and Persian Iranian month names.
* Adds a context menu item for copying the Iranian dates...

Rated 5 out of 5 stars (23)
148 users