/usr/share/ is in xul-ext-cookie-monster 1.2.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/mozilla/
/usr/share/mozilla/extensions/
/usr/share/mozilla/extensions/{a463f10c-3994-11da-9945-000d60ca027b}/
/usr/share/mozilla/extensions/{3db10fab-e461-4c80-8b97-957ad5f8ea47}/
/usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/
/usr/share/doc/
/usr/share/doc/xul-ext-cookie-monster/
/usr/share/doc/xul-ext-cookie-monster/copyright
/usr/share/doc/xul-ext-cookie-monster/changelog.gz
/usr/share/doc/xul-ext-cookie-monster/changelog.Debian.gz
/usr/share/xul-ext/
/usr/share/xul-ext/cookie-monster/
/usr/share/xul-ext/cookie-monster/defaults/
/usr/share/xul-ext/cookie-monster/defaults/preferences/
/usr/share/xul-ext/cookie-monster/defaults/preferences/defaults.js
/usr/share/xul-ext/cookie-monster/chrome/
/usr/share/xul-ext/cookie-monster/chrome/cookiemonster.jar
/usr/share/xul-ext/cookie-monster/install.rdf
/usr/share/xul-ext/cookie-monster/chrome.manifest
/usr/share/mozilla/extensions/{a463f10c-3994-11da-9945-000d60ca027b}/{45d8ff86-d909-11db-9705-005056c00008}
/usr/share/mozilla/extensions/{3db10fab-e461-4c80-8b97-957ad5f8ea47}/{45d8ff86-d909-11db-9705-005056c00008}
/usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{45d8ff86-d909-11db-9705-005056c00008}
/usr/share/xul-ext/cookie-monster/defaults/preferences/000system.js