To block undesired websites while using Opera browser, there is an extension named Ublock.
It there is a modified hosts file (C:\Windows\System32\drivers\etc\hosts), it can be uploaded to the list.
Right click, Options
Then import file
For Tor web browser, modify “\Browser\TorBrowser\Data\Tor\torrc” file and add “MapAddress *.sadscammer.com” for each website.