/usr/share/liferea/opml/ is in liferea-data 1.8.3-0.1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/liferea/opml/feedlist_bg.opml
/usr/share/liferea/opml/feedlist_ca.opml
/usr/share/liferea/opml/feedlist_de.opml
/usr/share/liferea/opml/feedlist_en.opml
/usr/share/liferea/opml/feedlist_es.opml
/usr/share/liferea/opml/feedlist_eu.opml
/usr/share/liferea/opml/feedlist_fr.opml
/usr/share/liferea/opml/feedlist_gl.opml
/usr/share/liferea/opml/feedlist_he.opml
/usr/share/liferea/opml/feedlist_hu.opml
/usr/share/liferea/opml/feedlist_it.opml
/usr/share/liferea/opml/feedlist_nl.opml
/usr/share/liferea/opml/feedlist_pl.opml
/usr/share/liferea/opml/feedlist_pt.opml
/usr/share/liferea/opml/feedlist_pt_BR.opml
/usr/share/liferea/opml/feedlist_ru.opml
/usr/share/liferea/opml/feedlist_sk.opml
/usr/share/liferea/opml/feedlist_sv.opml