diff --git a/accessible/src/jsat/TouchAdapter.jsm b/accessible/src/jsat/TouchAdapter.jsm
index 72c1c3f87ba..765a6705294 100644
--- a/accessible/src/jsat/TouchAdapter.jsm
+++ b/accessible/src/jsat/TouchAdapter.jsm
@@ -106,6 +106,10 @@ this.TouchAdapter = {
       return;
     }
 
+    if (aEvent.mozInputSource == Ci.nsIDOMMouseEvent.MOZ_SOURCE_UNKNOWN) {
+      return;
+    }
+
     if (this._delayedEvent) {
       Utils.win.clearTimeout(this._delayedEvent);
       delete this._delayedEvent;
diff --git a/accessible/src/jsat/content-script.js b/accessible/src/jsat/content-script.js
index 90a10eb6174..17280e116b0 100644
--- a/accessible/src/jsat/content-script.js
+++ b/accessible/src/jsat/content-script.js
@@ -121,10 +121,17 @@ function activateCurrent(aMessage) {
       let x = Math.round((objX.value - docX.value) + objW.value / 2);
       let y = Math.round((objY.value - docY.value) + objH.value / 2);
 
-      let cwu = content.QueryInterface(Ci.nsIInterfaceRequestor).
-        getInterface(Ci.nsIDOMWindowUtils);
-      cwu.sendMouseEventToWindow('mousedown', x, y, 0, 1, 0, false);
-      cwu.sendMouseEventToWindow('mouseup', x, y, 0, 1, 0, false);
+      let node = aAccessible.DOMNode || aAccessible.parent.DOMNode;
+
+      function dispatchMouseEvent(aEventType) {
+        let evt = content.document.createEvent("MouseEvents");
+        evt.initMouseEvent(aEventType, true, true, content,
+                           x, y, 0, 0, 0, false, false, false, false, 0, null);
+        node.dispatchEvent(evt);
+      }
+
+      dispatchMouseEvent("mousedown");
+      dispatchMouseEvent("mouseup");
     }
   }