>>893
Firefox 52 ESR/Waterfox Classic users: If you are using the legacy Greasemonkey extension (version 3.11),
you need to manually edit version 2.1.5 or later. See: this recent thread.
https://greasyfork.org/en/scripts/1682-google-hit-hider-by-domain-search-filter-block-sites/discussions/76491