How to use rpm-ostree

Enable third party dnf repositories

sudo rpm-ostree install fedora-workstation-repositories
systemctl reboot

sudo dnf config-manager setopt updates-archive.enabled=0
sudo dnf config-manager setopt google-chrome.enabled=1
sudo dnf config-manager setopt rpmfusion-free.enabled=1
sudo dnf config-manager setopt rpmfusion-free-updates.enabled=1

Pin current booted install to stop it being cleaned up

sudo ostree admin pin booted

Temporarily create /usr overlay (lost on next boot)

sudo rpm-ostree usroverlay