We want to move to flatpaks as much as possible, and stop including apps like firefox as rpms in the OS image. Since we still want to preinstall a useful set of applications, we need to be able to preinstall flatpaks.

From a hallway discussion with Colin a while ago, this probably requires us to have a flatpak repository on the iso and install the apps from there.

I've started some initial discussion on this here:

https://www.redhat.com/archives/anaconda-devel-list/2018-April/msg00002.html

Endless is working on p2p support for ostree and flatpak that will be useful for this.