Package: epiphany-browser Version: 3.22.7-1 Add Depends: gvfs-backends or else right out of the box $ epiphany will produce error messages and the add blocker won't work.
Or, just add it as a Recommends, but be sure the default in the user's initial Preferences is to have adblocking disabled. See https://bugzilla.gnome.org/show_bug.cgi?id=784170
