@media(scripting: none)
https://video.twimg.com/ext_tw_video/1641732722535067650/pu/vid/556x360/SMVNpNEAoRCHUJAk.mp4
@stefanjudis: Very niche for sure, but Firefox Nightly is the first browser shipping @media (scripting: none) to detect disabled JavaScript in CSS. Video alt: example showing a greyed out site when JS is disabled.