/usr/lib/rhythmbox/plugins/lyrics/ is in rhythmbox-plugins 3.0.2-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/rhythmbox/plugins/lyrics/AstrawebParser.py
/usr/lib/rhythmbox/plugins/lyrics/DarkLyricsParser.py
/usr/lib/rhythmbox/plugins/lyrics/JetlyricsParser.py
/usr/lib/rhythmbox/plugins/lyrics/JlyricParser.py
/usr/lib/rhythmbox/plugins/lyrics/LyricWikiParser.py
/usr/lib/rhythmbox/plugins/lyrics/LyricsConfigureDialog.py
/usr/lib/rhythmbox/plugins/lyrics/LyricsParse.py
/usr/lib/rhythmbox/plugins/lyrics/LyricsSites.py
/usr/lib/rhythmbox/plugins/lyrics/TerraParser.py
/usr/lib/rhythmbox/plugins/lyrics/WinampcnParser.py
/usr/lib/rhythmbox/plugins/lyrics/lyrics.plugin
/usr/lib/rhythmbox/plugins/lyrics/lyrics.py