Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.Close
Mail Merge Featured
Mass Mail and Personal Mail
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.
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).
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.
Mail Redirect Featured
Allow to redirect (a.k.a. "remail") mail messages to other recipients.
Extra Folder Columns Featured
This extension is for those TB3 users who want the multiple-columns view that TB2 allowed
Image Zoom Featured
Adds zoom and rotation functionality for images...
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
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).
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)