/usr/share/javascript/mootools/mootools-more.js is in libjs-mootools 1.4.5~debian1-2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/javascript/mootools/mootools-more.min.js
/usr/share/javascript/mootools/mootools-more.min.js