Recently Updated Extensions
Disable DragAndDrop (Thunderbird) Requires Restart
Disable drag and drop on the folder tree in order to prevent unintended folder movement.
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.
Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird
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!
Before Tabs Toolbar Requires Restart
Adds a toolbar before the tabs.
Bugmail (fixed version) Requires Restart
A bugzilla companion (fixed version). Originally maintained by Fabrice Desré.
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.
Dictionary for recipient Requires Restart
Sets the spell check dictionary based on the first recipient
Sender Frequency Requires Restart
Adds a custom column for Sender Frequency to the thread pane
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).
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.
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.
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/
ExQuilla for Exchange Requires Restart
Thunderbird email accounts connecting to Microsoft Exchange Web Services.
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.
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)
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.
Year view Requires Restart
Year view for calendar.
Shrunked Image Resizer Requires Restart
Make your photos smaller, so they don't take forever to email.
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.