神

Very good. All I needed was a place holder for dark mode. In settings, under More.

placeholderBackground url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAAAAACoWZBhAAAAJElEQVQI12PUYWZgYGD4y8DAwMLMxAAFcAYRTJa/DDATCKoFANCbA0M7UjZFAAAAAElFTkSuQmCC") repeat scroll #fff

Просто супер!

This is my favorite extension. Extremely powerful once you understand how to use it.

.

Literally the BEST security addon for Firefox after NoScript, with almost the same level of power and control.

Chromeの方でサポートを打ち切るとあるので選択肢を考えます。