3 files changed, 15 insertions, 6 deletions
diff --git a/dom/html/nsHTMLDocument.cpp b/dom/html/nsHTMLDocument.cpp
index fea78dc37..be5a34d41 100644
--- a/dom/html/nsHTMLDocument.cpp
+++ b/dom/html/nsHTMLDocument.cpp
@@ -1536,6 +1536,18 @@ nsHTMLDocument::Open(JSContext* cx,
         nsCOMPtr<nsIDocument> ret = this;
         return ret.forget();
       }
+
+      // Now double-check that our invariants still hold.
+      if (!mScriptGlobalObject) {
+        nsCOMPtr<nsIDocument> ret = this;
+        return ret.forget();
+      }
+
+      nsPIDOMWindowOuter* outer = GetWindow();
+      if (!outer || (GetInnerWindow() != outer->GetCurrentInnerWindow())) {
+        nsCOMPtr<nsIDocument> ret = this;
+        return ret.forget();
+      }
     }
 
     nsCOMPtr<nsIWebNavigation> webnav(do_QueryInterface(shell));
diff --git a/dom/media/GraphDriver.cpp b/dom/media/GraphDriver.cpp
index 9b74bd58c..40e3b72cf 100644
--- a/dom/media/GraphDriver.cpp
+++ b/dom/media/GraphDriver.cpp
@@ -1055,6 +1055,7 @@ AudioCallbackDriver::StateCallback(cubeb_state aState)
 {
   STREAM_LOG(LogLevel::Debug, ("AudioCallbackDriver State: %d", aState));
   if (aState == CUBEB_STATE_ERROR && mShouldFallbackIfError) {
+    mShouldFallbackIfError = false;
     MonitorAutoLock lock(GraphImpl()->GetMonitor());
     // Fall back to a driver using a normal thread. If needed,
     // the graph will try to re-open an audio stream later.
diff --git a/dom/performance/PerformanceTiming.cpp b/dom/performance/PerformanceTiming.cpp
index 97bbcb0ca..5f771f0aa 100755
--- a/dom/performance/PerformanceTiming.cpp
+++ b/dom/performance/PerformanceTiming.cpp
@@ -307,12 +307,8 @@ PerformanceTiming::SecureConnectionStartHighRes()
   if (!nsContentUtils::IsPerformanceTimingEnabled() || !IsInitialized()) {
     return mZeroTime;
   }
-
-  // Round down to the nearest 1ms
-  const double maxResolutionMs = 1;
-  return mSecureConnectionStart.IsNull()
-         ? mZeroTime
-         : floor(TimeStampToDOMHighRes(mSecureConnectionStart) / maxResolutionMs) * maxResolutionMs;
+  return mSecureConnectionStart.IsNull() ? mZeroTime
+                                         : TimerClamping::ReduceMsTimeValue(TimeStampToDOMHighRes(mSecureConnectionStart));
 }
 
 DOMTimeMilliSec