Index: www/firefox-esr-i18n/Makefile
===================================================================
--- www/firefox-esr-i18n/Makefile	(revision 439971)
+++ www/firefox-esr-i18n/Makefile	(working copy)
@@ -16,6 +16,8 @@
 
 EXTRACT_DEPENDS=	zip:archivers/zip
 
+BROKEN_aarch64=		fails to install: firefox- is installed and wanted version is firefox-
+
 USES=		zip:infozip gecko:firefox,build
 USE_XPI=	firefox linux-firefox
 
Index: www/firefox-i18n/Makefile
===================================================================
--- www/firefox-i18n/Makefile	(revision 439971)
+++ www/firefox-i18n/Makefile	(working copy)
@@ -16,6 +16,8 @@
 
 EXTRACT_DEPENDS=	zip:archivers/zip
 
+BROKEN_aarch64=		fails to install: /usr/local/bin/firefox --version 2>/dev/null exited on a signal
+
 USES=		zip:infozip gecko:firefox,53,build
 USE_XPI=	firefox