diff --git a/dom/base/crashtests/666869.html b/dom/base/crashtests/666869.html
new file mode 100644
index 000000000000..ac11f64e12b3
--- /dev/null
+++ b/dom/base/crashtests/666869.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script>
+
+function boom()
+{
+  var f = document.getElementById("f");
+  var frameWin = f.contentWindow;
+  document.body.removeChild(f);
+  frameWin.performance;
+}
+
+</script>
+</head>
+<body onload="boom();"><iframe id="f" src="data:text/html,1"></iframe></body>
+</html>
diff --git a/dom/base/crashtests/crashtests.list b/dom/base/crashtests/crashtests.list
index 6b1cfba881d9..b4ce015721c5 100644
--- a/dom/base/crashtests/crashtests.list
+++ b/dom/base/crashtests/crashtests.list
@@ -27,3 +27,4 @@ load 601247.html
 load 609560-1.xhtml
 load 612018-1.html
 load 637116.html
+load 666869.html
diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index 1218f93d3068..6f3e54ae685e 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -2987,6 +2987,9 @@ nsGlobalWindow::GetPerformance(nsIDOMPerformance** aPerformance)
 
   if (nsGlobalWindow::HasPerformanceSupport()) {
     if (!mPerformance) {
+      if (!mDoc) {
+        return NS_OK;
+      }
       nsRefPtr<nsDOMNavigationTiming> timing = mDoc->GetNavigationTiming();
       if (timing) {
         mPerformance = new nsPerformance(timing);
