/usr/share/applications/font-manager.desktop is in font-manager 0.5.7-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | [Desktop Entry]
Version=1.0
Name=Font Manager
Name[en_US]=Font Manager
Comment=Preview, compare and manage fonts
Type=Application
Exec=font-manager
Terminal=false
StartupNotify=false
Icon=preferences-desktop-font
Categories=Graphics;Viewer;GNOME;GTK;Publishing;
|