iCloud.com displays a custom thumbnail icon in Safari’s Top Sites [Updated]

Does anyone know if this is powered by some kind of markup that any site can use to supply browsers with a custom thumbnail or icon for Top Sites-like views?

Update: Nik Fletcher describes how this works, as it involves an apparently undocumented snippet of JavaScript for serving up this preview image.

You May Also Like

💻 10.15: New window controls for Split View, Sidecar

Apple made it easy to use the new Sidecar feature and put apps and windows into Split View.