Top-Rated Extensions


3e Calendar Requires Restart

Adds support for 3e calendars

Rated 1 out of 5 stars (1)
616 users

Patch to Alert Invalid Addresses Requires Restart

Shows alert if there is any invalid address in sending message.

Rated 1 out of 5 stars (1)
98 users

Don't Send Linked Files Requires Restart

Prevents sending of linked files if they are file: URLs.

Rated 1 out of 5 stars (1)
23 users

Perapera Japanese-French Dictionary File Requires Restart

This is additional dictionary file for use with the Perapera Japanese Pop-up Dictionary add-on.

Rated 1 out of 5 stars (1)
71 users

my site 1.0

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

Rated 1 out of 5 stars (1)
8 users

Me Hincha

Ahora también podés decir todo lo que te hincha en Facebook!
Descargá tu botón ME HINCHA para utilizar en Facebook y contale a todos tus amigos que te hincha.
Únicamente disponible para Mozilla Firefox.

Rated 1 out of 5 stars (1)
1 user

GQueues Tab Requires Restart

This extension uses the new special tab features of Thunderbird 3 to open the GQueues to-do list manager inside a Thunderbird tab.

Rated 1 out of 5 stars (1)
15 users

Bulk List Filter Requires Restart

The Bulk List filter addon provides a set of preconfigured search folders for popular services such as Facebook, eBay, Amazon and more.

Rated 1 out of 5 stars (1)
16 users

Check Recipients Requires Restart

Checks the existence of email addresses of all recipients in Compose message window from local address books and LDAP directories.

Rated 1 out of 5 stars (1)
4 users

Show SMTP Username Requires Restart

Displays username (if available) next to SMTP...

Rated 1 out of 5 stars (1)
50 users

Flex Confirm Mail Requires Restart

Confirm mail address and attachments based on flexible rules.

Rated 1 out of 5 stars (1)
12,262 users

Redmine連携 Requires Restart


Rated 1 out of 5 stars (1)
160 users

Locale2MUI Requires Restart

Sets Firefox/Thunderbird Locale to Windows (MUI) Language on startup

Rated 1 out of 5 stars (1)
430 users

Mailopen Requires Restart

Open an email file from the commandline

Rated 1 out of 5 stars (1)
22 users

Lowercase Email Addresses in Message Headers Requires Restart

Shows lowercase email addresses in message headers and their tooltips.

Rated 1 out of 5 stars (1)
154 users

Large Fonts Requires Restart

This add-on enables you to change the font size of the plain text editor of Thunderbird.

Rated 1 out of 5 stars (1)
422 users

ToggleFullHeaders Requires Restart

Allows you to customise the message panel buttons to add a "Toggle Headers" button that will switch between showing and hiding the full headers.

Rated 1 out of 5 stars (1)
102 users

Mukparasi Requires Restart

A Korean popup dictionary based on Rikaichan
Requires the additional dictionary addon.

Rated 1 out of 5 stars (1)
20 users

Disable about:config Requires Restart

Disable about:config feature of Firefox and Thunderbird.

Rated 1 out of 5 stars (1)
899 users

Attach from Clipboard Requires Restart

Create file attachments directly from the system clipboard.

Not yet rated
16 users