40 Add-ons in this Collection
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.
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
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.
Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Czech spell checking dictionary for all Mozilla applications includes both standard and ascii version.
Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers
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!
Enables Adobe Acrobat-style grab and drag scrolling, Flick gestures, and Momentum scrolling in Firefox. Useful for (older) pen or touchscreen-based devices for which these gestures are not natively supported. Not useful on Windows 8 touch devices.
Asks for the master password at startup (fixes multiple password prompt)
Signatures for Gmail, Google Mail, Yahoo Mail
Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.
Displays icon for user agent of received mails.
Thunderbird Message Filter Import/Export is a thunderbird/mozilla extension to import/export message filters.