Having an API for this is, a bit counterintuitively, good for people who don't like transitions: it means building an extension that turns them off is easy. If

Having an API for this is, a bit counterintuitively, good for people who don't like transitions: it means building an extension that turns them off is easy. If websites are implementing transition animations on top of other browser features it's very hard for an extension to recognize them, but not if there's a standard API.