I just tested with the latest versions of Firefox Nightly 104.0a1 (2022-07-18) (64-bit) and Tampermonkey 4.17.6161 and it worked just fine. Tampermonkey complains about the use @id and @include, yet the script still works.
If you're using Firefox and it supports the good old userContent.css, you can just add this style there, because all the userscript does is add this style to the document. This requires a browser restart.
Code:
@-moz-document domain("ancensored.com")
{
body:before { content: unset !important; }
.container { display: block !important; }
body, body > div { display: block !important; }
#ad-block-notification { display: none !important; }
}