/usr/lib/xul-ext/lightning/components/calStorageCalendar.manifest is in xul-ext-lightning 1.3+build1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | component {b3eaa1c4-5dfe-4c0a-b62a-b3a514218461} calStorageCalendar.js
contract @mozilla.org/calendar/calendar;1?type=storage {b3eaa1c4-5dfe-4c0a-b62a-b3a514218461}
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