diff

diff --git a/dom/events/test/test_DataTransferItemList.html b/dom/events/test/test_DataTransferItemList.html
--- a/dom/events/test/test_DataTransferItemList.html
+++ b/dom/events/test/test_DataTransferItemList.html
@@ -30,6 +30,7 @@
     var dragstartFired = 0;
     draggable.addEventListener('dragstart', onDragStart);
     function onDragStart(e) {
+      console.log("dragstart");
       draggable.removeEventListener('dragstart', onDragStart);
 
       var dt = e.dataTransfer;
@@ -123,8 +124,24 @@
     var dragenterFired = 0;
     over.addEventListener('dragenter', onDragEnter);
     function onDragEnter(e) {
+      console.log("dragenter")
       over.removeEventListener('dragenter', onDragEnter);
 
+      const transferable = Cc[
+        "@mozilla.org/widget/transferable;1"
+      ].createInstance(Ci.nsITransferable);
+      transferable.init(null);
+      transferable.addDataFlavor("text/plain");
+      transferable.addDataFlavor("text/unicode");
+
+       var ds = Cc["@mozilla.org/widget/dragservice;1"].
+                getService(Ci.nsIDragService);
+      try {
+        ds.getCurrentSession().getData(transferable, 0);
+      } catch (e) {
+        console.error(e);
+      }
+
       var dt = e.dataTransfer;
       dragenterFired++;
 
@@ -137,6 +154,7 @@
     var dropFired = 0;
     over.addEventListener('drop', onDrop);
     function onDrop(e) {
+      console.log("drop");
       over.removeEventListener('drop', onDrop);
 
       var dt = e.dataTransfer;