Saphire Lattice is a user on dragon.style. You can listen to them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.
Saphire Lattice @saphire
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I have discovered CSS "scrollbar-width" and "scrollbar-color" non-prefixed mozilla-only properties.

Setting it to have transparent track is darn weird.