Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
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)
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
Image Zoom Featured
Adds zoom and rotation functionality for images...
Contacts Sidebar Featured
Displays the address books in a sidebar in Thunderbirds 3-pane-window and can be toggled with the F4 key or a toolbar button.
Visit my Contacts Sidebar site for recent versions and news.
Mail Redirect Featured
Allow to redirect (a.k.a. "bounce") mail messages to other recipients.
Signature Switch Featured
Switch the signature on/off or choose a new one from your predefined set...
LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Mail Merge Featured
Mass Mail and Personal Mail
Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!
Adblock Plus No Restart Featured
Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
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.
This add-on is not compatible with your version of Thunderbird because of the following:
- Add-on has opted into strict compatibility checking.