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.
ImportExportTools Necesita reiniciarse
Adds some tools to import and export folders and messages
DOM Inspector Necesita reiniciarse
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.
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.
Permite vaciar la papelara y compactar las carpetas en múltiples cuentas de Thunderbird.
PrintingTools Necesita reiniciarse
Adds some options to print messages and addressbooks
Add-on has now been discontinued, see below.
Display Quota Necesita reiniciarse
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...
FileLink provider for WebDAV Destacados
Uploads your large attachments to your WebDAV account instead of sending them by email.
Redirigir correo (Mail Redirect) Necesita reiniciarse
Permitir redirigir (o "rebotar") mensajes de correo a otros destinatarios.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.
Display Mail User Agent T Destacados
Displays the mail program with which the selected mail was written
*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.
MinimizeToTray revived Necesita reiniciarse
Minimizes windows into the system tray.
Google Keep en Thunderbird
Calendar Tweaks Necesita reiniciarse
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.
LightningButton Necesita reiniciarse
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
Auto Compress File Necesita reiniciarse
Compressor for attachment files. All platforms are supported (Windows, Linux and Macintosh).
Moves the toolbar back above the tabbar.
URL Link is a small 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.