The preorders haven’t started yet, which I guess they just implemented by setting the stock to 0. Preorders open at the 1st of May at 9:00AM PST according to the product page.

Kubernetes and docker both use containerd, which in turn uses runc which is what the vulnerability is in.

On Android about:config is only available on the Firefox Beta and Firefox Nightly apps, not on any of the other versions.