/usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{72b2e02b-3a71-4895-886c-fd12ebe36ba3} is in webext-bulk-media-downloader 0.2.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/../../../webext/bulk-media-downloader