diff --git a/www/mozplugger/Makefile b/www/mozplugger/Makefile
index 4586dfcbaa5f..a1ae96c47817 100644
--- a/www/mozplugger/Makefile
+++ b/www/mozplugger/Makefile
@@ -1,30 +1,33 @@
 PORTNAME=	mozplugger
 PORTVERSION=	2.1.6
 CATEGORIES=	www
 MASTER_SITES=	http://mozplugger.mozdev.org/files/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Framework for loading web content in external viewers
 WWW=		http://mozplugger.mozdev.org/
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+DEPRECATED=	Obsolete, defunct as Mozilla Firefox dropped support for plugin interface as of ESR 60
+EXPIRATION_DATE=2023-11-30
+
 GNU_CONFIGURE=	yes
 USES=		desthack gmake webplugin:native xorg
 USE_XORG=	x11 xt
 LLD_UNSAFE=	yes
 
 WEBPLUGIN_FILES=mozplugger.so
 MAKE_ENV=	WEBPLUGINS_DIR="${WEBPLUGIN_DIR}"
 MAKE_ARGS=	root=${STAGEDIR}
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|"/etc|"${PREFIX}/etc|g' \
 		${WRKSRC}/mozplugger.c
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/mozplugger-*
 	@${STRIP_CMD} ${STAGEDIR}${WEBPLUGIN_DIR}/*.so
 
 .include <bsd.port.mk>