epilicious.dev repo now has changes adding support for ma.gnolia. The configuration dialogue is modified to allow changing between the two supported backends.
Furthermore my APT repo holds an updated version of
epiphany-extension-epilicious-pre that can be installed alongside the GNOME version of epilicious that comes in
epiphany-extensions. That is, it can be used with Epiphany 2.18 from Debian experimental.
As always, comments and bug report are more than welcome.