It's working fine. Problem is Opera is sucks. Its disabling addons/extensions on default search engines. to fix this go to extensions (Ctrl+Shit+E) find Violentmonkey or what you use, and select “Allow access to search page results”.
This script is my favorite, thanks for this addon.
I said not working but I can't delete my comment. here: https://greasyforks.org/tr/scripts/1682-google-hit-hider-by-domain-search-filter-block-sites/discussions/121770
It's working fine. Problem is Opera is sucks. Its disabling addons/extensions on default search engines. to fix this go to extensions (Ctrl+Shit+E) find Violentmonkey or what you use, and select “Allow access to search page results”.
This script is my favorite, thanks for this addon.