Since version >3.12, the contents of gnome-icon-theme has now moved to adwaita-icon-theme. Epiphany should update its dependencies to "|| (>=x11-themes/adwaita-3.14.1 >=x11-themes/gnome-icon-theme-2.17.1)", or perhaps drop the dep on gnome-icon-theme completely if that package is going to be removed soon Reproducible: Always
fixed in 3.18