Up & Coming Extensions
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!
The best Translator for your new Thunderbird 78!
Available also for your Firefox web browser.
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.
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.
Allows to switch between the normal header view and viewing all headers when viewing a message by using a keyboard shortcut (Ctrl+H).
DKIM Verifier Featured
Verifies the DKIM-Signature of an e-mail.
Limits displayed headers to 1 or 2 lines.
Sets the spell check dictionary based on the first recipient
MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.
Phoenity icons for Thunderbird
Shows a colorful border around the "New Message" window, so you can tell different identities apart.
Builds on the original BorderColors and the "GT" version, adding different border styles.
Add notes to your e-mails. Drop-in replacement for XNote++ with more features.
Persistent sticky notes for Thunderbird associated to mails.
In TB 78, you can define the note position in the settings. If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.
Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
This module allows you to change/edit email subjects
True "Send Later" functionality to schedule the time for sending an email.
Upload large attachments to your Cloud and send the link by email
Monterail Full Dark, a Thunderbird theme inspired by the mockup of Monterail
Put an unread mail count badge on the Thunderbird icon in the Windows taskbar.