Is there any reason that this cannot be packaged separately from the
'firefox' SRPM and included as part of Fedora Workstation? I don't
think it's an unreasonable thing for the Workstation WG to decide
should be default on that Product.
the gnome-initial-setup perhaps that asks if you're using a
Ship with Epiphany as well as Firefox? Then we can have useful UI in
touchscreen or detects hi-dpi and then advises you to change the
default browser to Epiphany.