+.for appdir in ${USE_XPI}
+.if ${appdir:Mfirefox}
+XPI_APPS?=     ${USE_XPI:S.^.${LOCALBASE}/lib/.:S.$./browser/extensions.}
+.else
 XPI_APPS?=     ${USE_XPI:S.^.${LOCALBASE}/lib/.:S.$./extensions.}
+.endif
+.endfor
+