Up & Coming Extensions
Highlights selected text when composing emails. Default colour is yellow - other colours are available via Options.
(Works only during writing an e-mail, i.e. only in the compose window.)
Beautifully visualized statistics for your Thunderbird Email Accounts
Adds a full sender and recipient e-mail column to message list panel.
Allows you to resend (also known as redirect) email messages.
Uses 'cardbook' if installed
Bases on the add-on 'Mail Redirect' by Onno Ekker and Pawel Krzesniak
Please see the help page on how to use and why it sometimes does not work!
Message & Address Printing Tools (NextGen)
New 78 Update! 68/78 Compatible
Adds calendars containing the birthdays from your address books.
The best Translator for Thunderbird 78!
Available also for Firefox!
Unofficial DeepL translate extension for Thunderbird.
Shortcuts to move/copy messages, with folder name completion.
Set rules for moving of messages to associated folders.
View images inside TB without external viewer.
Donations to transfer to TB 78 and adding new features are acknowledged.
Create file attachments directly from the system clipboard.
Auto Compress File Requires Restart
Compressor for attachment files. All platforms are supported (Windows, Linux and Macintosh).
Copy Folder Requires Restart
The missing Thunderbird "copy folder" feature! Copy folders or entire POP/IMAP accounts recursively to any location while maintaining folder structure.
WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.
Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
Getting things done and clean up your inbox! While moving a mail the first time, QuickArchiver remembers the destination folder and enables you to move further mails with a single click. You can apply rules by sender, recipient and subject.
You can change icon display and button order. You can also hide unnecessary buttons.
Configure text and background colors of quotes in mail and news messages.
Custom Address Sidebar Requires Restart
Allow you to help address sidebar more useful.
Limits displayed headers to 1 or 2 lines.