/usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37 is in libwebkit2gtk-4.0-37 2.20.5-0ubuntu0.16.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37.28.5