diff --git a/dom/src/jsurl/crashtests/341963-1.html b/dom/src/jsurl/crashtests/341963-1.html
new file mode 100644
index 00000000000..2cdb467d13d
--- /dev/null
+++ b/dom/src/jsurl/crashtests/341963-1.html
@@ -0,0 +1,8 @@
+<script>
+
+location = "javascript:x.x.x";
+
+for(var i in {})
+  ;
+
+</script>
diff --git a/dom/src/jsurl/crashtests/crashtests.list b/dom/src/jsurl/crashtests/crashtests.list
index cda0b7b7cab..6ff35ca7ad7 100644
--- a/dom/src/jsurl/crashtests/crashtests.list
+++ b/dom/src/jsurl/crashtests/crashtests.list
@@ -1,2 +1,3 @@
+load 341963-1.html
 load 344874-1.html
 load 344996-1.xhtml