Thunderbird

by Monique Brunel

27 Add-ons in this Collection

Lightning by Mozilla Calendar Project

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

ImportExportTools by Paolo "Kaosmos"

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Experimental

Rated 4 out of 5 stars 161 reviews

409,424 users

Adds some tools to import and export folders and messages

Provider for Google Calendar by Philipp Kewisch

Rated 4 out of 5 stars 951 reviews

311,162 users

Allows bidirectional access to Google Calendar

QuickNote by Leszek Życzkowski, Jed Brown, others

Rated 5 out of 5 stars 174 reviews

23,029 users

A simple note-taking extension.

gContactSync by Josh Geenen

Rated 4 out of 5 stars 224 reviews

86,289 users

Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.

Remove Duplicate Messages (Alternate) by Eyal Rozenberg

Rated 4 out of 5 stars 159 reviews

61,742 users

Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).

Thunderbird Conversations by Jonathan Protzenko, Standard8

Rated 4 out of 5 stars 417 reviews

29,813 users

This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.

Quicktext by WizKid, R Kent James

Rated 4 out of 5 stars 293 reviews

86,108 users

Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

CompactHeader by jmozmoz

Rated 5 out of 5 stars 162 reviews

100,660 users

Add symbol in header plane to switch between compact and expanded view. Options to switch between one or two lines compact view, which buttons should be displayed in header pane. For Thunderbird 36 and older use version 2.0.9 (see version history)

Toolbar Buttons by Button Guy

Rated 4 out of 5 stars 334 reviews

20,681 users

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

AttachmentExtractor by Andrew Williamson

Rated 4 out of 5 stars 163 reviews

32,112 users

Extracts all attachments from selected messages and then can delete, detach or mark-read.

Signal Spam by Signal Spam

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

URL Link by Neil Bird

URL Link is a small Firefox and Thunderbird extension that allows you to select a non-URL in a mail/news message or web-page, and open it in a browser window.

Display Mail User Agent by Jürgen Ernst

Displays icon for user agent of received mails.

Quote Colors by Malte Ruecker

Rated 4 out of 5 stars 45 reviews

5,259 users

Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
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