Recently Updated Extensions
A new Thunderbird address book based on the CardDAV and vCard standards.
Confirm conversions of e-mail to event and task at selecting thread tree children.
Glory be to God!
HERA helps hotels to semi or fully automatically respond to emails by checking rates in your PMS / CRS
Thunderbird Conversations Featured
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.
SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.
List addons in Windows' "Add or Remove Programs".
Restores the charset menu removed in Thunderbird 91 and fixes an issue in Thunderbird 78.
Sets the spell check dictionary based on the first recipient
Adds a custom column for Sender Frequency to the thread pane
Display Mail User Agent T Featured
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.
Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers
A revival of the popular Markdown-Here addon for Thunderbird 78 and beyond.
Markdown Here Revival is a Thunderbird extension that lets you write emails in Markdown and render them as HTML before sending.
GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.
Shortcuts to move/copy/archive messages, with folder name completion.
Set rules for moving messages to associated folders.
Automatic rules by statistical observation.
View images inside TB without external viewer.
For v2.3/TB 78.11 see below
This provider add-on adds Google synchronization capabilities to TbSync. Only contacts and contact groups are currently managed, using Google's People API.
Please read the "About this Add-on" section below carefully!
Unofficial DeepL translate extension for Thunderbird.
Mail filter search term using mailing lists (and not whole addressbooks).
Upload large attachments to your Cloud and send the link by email
Configure text and background colors of quotes in mail and news messages.
Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).