diff --git a/tool/mypdns_defender/addon/firefox/main.js b/tool/mypdns_defender/addon/firefox/main.js
new file mode 100644
index 0000000000..3cf20d57b0
--- /dev/null
+++ b/tool/mypdns_defender/addon/firefox/main.js
@@ -0,0 +1 @@
+-
\ No newline at end of file