$OpenBSD$

index d8b0925..2cd0aa8 100644
--- dom/base/nsPerformance.cpp.orig	Fri Feb 20 15:40:37 2015
+++ dom/base/nsPerformance.cpp	Fri Feb 20 15:40:37 2015
@@ -39,7 +39,12 @@ nsPerformanceTiming::nsPerformanceTiming(nsPerformance* aPerformance,
 {
   MOZ_ASSERT(aPerformance, "Parent performance object should be provided");
   SetIsDOMBinding();
-  // The aHttpChannel argument is null if this nsPerformanceTiming object
+
+  if (!nsContentUtils::IsPerformanceTimingEnabled()) {
+    mZeroTime = 0;
+  }
+
+ // The aHttpChannel argument is null if this nsPerformanceTiming object
   // is being used for the navigation timing (document) and has a non-null
   // value for the resource timing (any resources within the page).
   if (aHttpChannel) {