Recently i found that while basic stop autoplay option in Firefox does not work reliably, if one also sets media.autoplay.blocking_policy = 2, it works much bet

Recently i found that while basic stop autoplay option in Firefox does not work reliably, if one also sets media.autoplay.blocking_policy = 2, it works much better than the default policy. But it seems it is still just a heuristic that blocks some JS play commands, while allows them in some context.