Allows bidirectional access to Google Calendar
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Adds some tools to import and export folders and messages
Mail Redirect 需要重开
DOM Inspector 需要重开
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Display Quota 需要重开
This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...
Add-on has now been discontinued, see below.
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
Calendar Tweaks 需要重开
Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.
Empties the Trash and Junk folders, and compacts folders in multiple Thunderbird accounts.
Adds some options to print messages and addressbooks
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.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Minimizes windows into the system tray.
Add Signature 需要重开
Simply add your signature manually (right mouse click) to your emails
This Thunderbird addon lets you customize the IMAP quota statusbar panel.
Google Keep for Thunderbird
Uploads your large attachments to your WebDAV account instead of sending them by email.
Rise of the Tools 需要重开
Moves the toolbar back above the tabbar.