Recently Updated Extensions

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Disable DragAndDrop (Thunderbird) Requires Restart

Disable drag and drop on the folder tree in order to prevent unintended folder movement.

Not yet rated
0 users
Updated July 10, 2019

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 (4)
1,076 users
Updated July 10, 2019

Owl for Exchange

Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird

Rated 5 out of 5 stars (10)
2,256 users
Updated July 8, 2019

QuickFolders (Tabbed Folders) Requires Restart

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Rated 5 out of 5 stars (130)
21,775 users
Updated July 8, 2019

Before Tabs Toolbar Requires Restart

Adds a toolbar before the tabs.

Rated 4 out of 5 stars (9)
391 users
Updated July 6, 2019

Bugmail (fixed version) Requires Restart

A bugzilla companion (fixed version). Originally maintained by Fabrice Desré.

Not yet rated
33 users
Updated July 6, 2019

ThunderHTMLedit Requires Restart

Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.

Rated 5 out of 5 stars (14)
5,121 users
Updated July 6, 2019

Dictionary for recipient Requires Restart

Sets the spell check dictionary based on the first recipient

Not yet rated
100 users
Updated July 6, 2019

Sender Frequency Requires Restart

Adds a custom column for Sender Frequency to the thread pane

Rated 4 out of 5 stars (4)
225 users
Updated July 6, 2019

CategoryManager Requires Restart

Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).

Rated 5 out of 5 stars (9)
4,762 users
Updated July 5, 2019

Thunderbird Taiga Integration Requires Restart

Convert mails to user stories, tasks and tickets for the Taiga project management system. See https://pehei.de/post/thunderbird-taiga-integration for instructions.

Not yet rated
3 users
Updated July 5, 2019

Use BCC Instead C Requires Restart

This is a version of 'Use BCC Instead' updated for Thunderbird 64 and above.

It prevents you accidentally sending an email to a large number of recipients without hiding their addresses from each other by using BCC.

Not yet rated
1 user
Updated July 5, 2019

CompactHeader Requires Restart Featured

Add symbol in header plane to switch between compact and expanded view. New beta versions for the current beta of Thunderbird 68.0 can be found at https://github.com/jmozmoz/compactheader/

Rated 5 out of 5 stars (173)
87,760 users
Updated July 4, 2019

ExQuilla for Exchange Requires Restart

Thunderbird email accounts connecting to Microsoft Exchange Web Services.

Rated 4 out of 5 stars (94)
23,728 users
Updated July 4, 2019

FiltaQuilla Requires Restart

Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.

Rated 4 out of 5 stars (81)
10,492 users
Updated July 1, 2019

Get/Send Button Requires Restart

Extends the original "Get" button (optionally) to "Get/Send" and adds a popup menu with additional functions.

You may want to use it together with the following Add-ons:
* Send Later Button (by me / Alexander Ihrig)
* Send Later (by jikamens)

Rated 4 out of 5 stars (47)
8,359 users
Updated June 30, 2019

ThreadKey Requires Restart

Strike the 'T' key to sort messages by thread, strike the 'U' key to sort them unthreaded again, just like the 'G' key switches to Grouped By Sort view.

Rated 4 out of 5 stars (24)
1,457 users
Updated June 26, 2019

Year view Requires Restart

Year view for calendar.

Rated 4 out of 5 stars (50)
3,170 users
Updated June 26, 2019

Shrunked Image Resizer Requires Restart

Make your photos smaller, so they don't take forever to email.

Rated 4 out of 5 stars (42)
7,126 users
Updated June 26, 2019

Teamworkx Thunderbird Integration for Jira Requires Restart

This is a add-on for Thunderbird 60+/Seamonkey 2.x which is able to create Atlassian Jira issues out of e-mails or add the content of an e-mail as a comment on an Jira issue.

Rated 4 out of 5 stars (13)
369 users
Updated June 19, 2019