/usr/lib/firefox-esr-devel-52/sdk/bin/run-mozilla.sh is in firefox-esr-dev 52.8.1esr-1~deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/firefox-esr-devel-52/sdk/bin/../../../firefox-esr/run-mozilla.sh