30 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.
Use the Evernote Web Clipper to save things you see on the web into your Evernote account.
Allows bidirectional access to Google Calendar
This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.
Adds the Google Calendar web interface as a new tab directly into Thunderbird. Creating and viewing events works just as it would in a browser like Firefox
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.
Allow to redirect (a.k.a. "remail") mail messages to other recipients.
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
Add symbol in header plane to switch between compact and expanded view. Options to switch between one or two lines compact view, which buttons should be displayed in header pane. For Thunderbird 36 and older use version 2.0.9 (see version history)
Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers
Displays icon for user agent of received mails.
Thunderbird Message Filter Import/Export is a thunderbird/mozilla extension to import/export message filters.
Associates user-defined colors with accounts and identities. Applies these colors to accounts, identities, folders, message list, message headers and compose headers. Users will always know which accounts/identities they are working with.