Not sure if this is relevant, but while moving the slider around, in chromium i see 40% gpu utilisation, while in firefox less than 20% (macbook m3 pro). I do not observe any noticeable difference otherwise in terms of quality.

PS Neat website and explanations, but talking about the liquid glass as a design principle in general, I would rather ui elements in a random website not use that much of gpu for not great reasons but maybe that's my problem of not thinking different.