userContent.css in Firefox which allows me to inject a stylesheet into every page.@media (prefers-color-scheme: dark) rule to display differently on dark monitors. My issue is the default background for a SVG opened by itself is "transparent", but is effectively white.@media (prefers-color-scheme: dark) { svg { background-color: #0008 } } style, which worked, but it affects every SVG on every page, & generally makes the browser look crappy.:root > svg, but that doesn't work. ¿Anyone got a clue