/usr/share/ is in xul-ext-gdata-provider 1.3+build1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xul-ext/
/usr/share/xul-ext/gdata-provider/
/usr/share/xul-ext/gdata-provider/chrome/
/usr/share/mozilla/
/usr/share/mozilla/extensions/
/usr/share/xul-ext/gdata-provider/chrome/gdata-provider-en-US.jar
/usr/share/xul-ext/gdata-provider/chrome/gdata-provider.jar
/usr/share/xul-ext/gdata-provider/chrome.manifest
/usr/share/xul-ext/gdata-provider/components/
/usr/share/xul-ext/gdata-provider/components/calGoogleCalendarModule.js
/usr/share/xul-ext/gdata-provider/components/calGoogleCalendarModule.manifest
/usr/share/xul-ext/gdata-provider/components/gdata.xpt
/usr/share/xul-ext/gdata-provider/components/interfaces.manifest
/usr/share/xul-ext/gdata-provider/defaults/
/usr/share/xul-ext/gdata-provider/defaults/preferences/
/usr/share/xul-ext/gdata-provider/defaults/preferences/preferences.js
/usr/share/xul-ext/gdata-provider/install.rdf
/usr/share/xul-ext/gdata-provider/js/
/usr/share/xul-ext/gdata-provider/js/calGoogleCalendar.js
/usr/share/xul-ext/gdata-provider/js/calGoogleRequest.js
/usr/share/xul-ext/gdata-provider/js/calGoogleSession.js
/usr/share/xul-ext/gdata-provider/js/calGoogleUtils.js
/usr/share/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/
/usr/share/mozilla/extensions/{718e30fb-e89b-41dd-9da7-e25a45638b28}/
/usr/share/mozilla/extensions/{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}/
/usr/share/doc/
/usr/share/doc/xul-ext-gdata-provider/
/usr/share/doc/xul-ext-gdata-provider/copyright
/usr/share/xul-ext/gdata-provider/defaults/preferences/000system.js
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/usr/share/doc/xul-ext-gdata-provider/changelog.Debian.gz