--- Makefile.orig	2011-07-26 22:58:01.000000000 +0200
+++ Makefile	2011-09-16 23:53:53.000000000 +0200
@@ -7,6 +7,7 @@
 
 PORTNAME=	flashblock
 PORTVERSION=	1.5.15.1
+PORTREVISION=	1
 DISTVERSIONSUFFIX=	-fx
 CATEGORIES=	www
 
@@ -19,4 +20,7 @@
 XPI_DIRS=	chrome defaults/preferences defaults
 
 .include "${.CURDIR}/../xpi-adblock/Makefile.xpi"
+
+USE_XPI=	*firefox*
+
 .include <bsd.port.mk>