> means "if the host matches news.ycombinator.com inject the following CSS" Well I wouldn't word it like that. youtube.com##.ytp-cards-teaser Hides eleme

> means "if the host matches news.ycombinator.com inject the following CSS" Well I wouldn't word it like that. youtube.com##.ytp-cards-teaser Hides elements with the selector ".ytp-cards-teaser", so ## doesn't represent "inject the followong CSS". This is a helpful link: https://github.com/gorhill/uBlock/wiki/Introduction-to-basic-filtering-syntax https://github.com/gorhill/uBlock/wiki/Introduction-to-basic... ## represents a cosmetic filter. Though I can't seem to figure out what #$# is still but I know that's also possible to use