Add-ons
Featured Extensions
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Enigmail
Requires Restart
Featured
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
This add-on is not compatible with your version of Thunderbird because of the following:
Mail MergeThis add-on is not compatible with your version of Thunderbird because of the following:
Adblock Plus
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).
This add-on is not compatible with your version of Thunderbird because of the following:
Mail Redirect
Requires Restart
Featured
Allow to redirect (a.k.a. "remail") mail messages to other recipients.
This add-on is not compatible with your version of Thunderbird because of the following:
CompactHeader
Requires Restart
Featured
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)
This add-on is not compatible with your version of Thunderbird because of the following:
Lightning
Requires Restart
Featured
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.
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