Most Popular Extensions
Preferential (New GUID) Requires Restart
Advanced preferences manager for Mozilla-based...
Identity Checker Requires Restart
This add-on checks to sender identity when send a message.
Workspace for Thunderbird Requires Restart
A simple editor for executing snippets of JS. In Thunderbird.
SendToSecondEmail Requires Restart
This Extension lets you send Mails to both, first and second email address...
Path Linker Requires Restart
Soapy Requires Restart
Bypasses DNS-based censorship
NOTE: This was created as a SOPA protest in 2012. This does not work anymore for most sites. Use Tor instead.
Shift Box Requires Restart
Replay your INBOX!
Tag the Bird Requires Restart
Tag the Bird gives the power of tagging to Thunderbird.
Forumzilla Requires Restart
Forumzilla lets you read news and blog feeds in your email application. It is similar to the feed reader built into Thunderbird, but it lets you download stories into any folder in any POP, IMAP, or local account (configurable per...
Lovebird Requires Restart
Email organized around the people you care about.
ePhotoUploader Requires Restart
ePhoto Uploader is a Mozilla/Firefox addon to allow you to upload any image on websites you're browsing to your ePhotoBay account by just one click. For the addon to work a free ePhotoBay account is required.
Notification Viewer Requires Restart
Identifies and displays the status of pending and received notifications (DSN, MDN) for messages sent with notification requests. To get full experience with this addon, don't forget to use DSN settings and MDN extended addons too.
ThreadBubble Requires Restart
Make Thunderbird resort threads by date when a new message arrives. *** This add-on is no longer required for new versions of Thunderbird! ***
FolderCheck Requires Restart
Allows you to easily tell Thunderbird to check multiple folders for messages
Email Notification Randomizer Requires Restart
Extension to randomize the email notification sound. Each time an email is received, the configured email notification sound is updated from the set of wav files in the configured folder...
Auto Password Registerer Requires Restart
Registers given passwords to Firefox/Thunderbird's password manager automatically.
Ethical signature Requires Restart
Add a button to the email composition toolbar, which lets you insert an ethical signature.
Perapera Japanese-French Dictionary File Requires Restart
This is additional dictionary file for use with the Perapera Japanese Pop-up Dictionary add-on.