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Add extra features and styles to make SeaMonkey your own.Close
Lightning 5.4 Requires Restart
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.
About this Add-on
Read the latest news and get information about known issues first by subscribing to our blog or following @mozcalendar on twitter.
Lighting 22.214.171.124 for Thunderbird 38 is available here
Lightning also supports older versions of Thunderbird like 24 or 31, please see the complete version history for details.
The Development Channel lets you test an experimental new version of this add-on before it's released to the general public. Once you install the development version, you will continue to get updates from this channel. To stop receiving development updates, reinstall the default version from the link above.
Caution: Development versions of this add-on have not been reviewed by Mozilla.
- Version 5.5b2