I meant that at the network level, should something be monitoring, your client would be making requests to a unique (ntfy) address that virtually nobody else ever uses. Requests to Mozilla are more crowd blended as it's quite popular already.

Aren’t the requests https?

Or you mean you are trying to hide from a network where you are mitm attacked?

Yes, they are https so security is not a concern. I want to crowd blend at the network level so that my requests don't aversive that I'm using a privacy notification system (or a VPN).