Do some countries force the browser companies to add their root cert, despite abuse?
Now it only sounds weird when a country exherts their national sovereignity because the US doesn't need to perform any additional steps to install any of their Certs, they have hundreds of them by design.
Yeah. I don't think the US explicitly requires it but they don't have to, there are more than enough US-based entities with root certificates who they could send a National Security Letter to if they ever wanted one. (Also the US FKPI root certificate is at least shipped by some vendors, although it seems to be disabled by default)