/usr/lib/x86_64-linux-gnu/libfm-qt.so is in libfm-qt-dev 0.12.0-14build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libfm-qt.so.3
/usr/lib/x86_64-linux-gnu/libfm-qt.so.3