The official app store for Firefox apps.
Privileged can only be hosted in the Firefox Marketplace.
Host your own apps on your own website.
Simple API call to install app.
Does not work for privileged APIs.
Send your app's zipfile to others.
They can push to their devices using WebIDE.
Harder method, but it works.
Import/export API is on its way.
Then you can share an app with a friend from your phone.