diff --git a/dom/base/Navigator.cpp b/dom/base/Navigator.cpp
index a507dea841..0f7f2b756e 100644
--- a/dom/base/Navigator.cpp
+++ b/dom/base/Navigator.cpp
@@ -678,6 +678,18 @@ Navigator::CpuHasSSE2()
   return mozilla::supports_sse2();
 }
 
+bool
+Navigator::CpuHasAVX()
+{
+  return mozilla::supports_avx();
+}
+
+bool
+Navigator::CpuHasAVX2()
+{
+  return mozilla::supports_avx2();
+}
+
 void
 Navigator::RefreshMIMEArray()
 {
diff --git a/dom/base/Navigator.h b/dom/base/Navigator.h
index 69626d1a7c..10f9573ee9 100644
--- a/dom/base/Navigator.h
+++ b/dom/base/Navigator.h
@@ -173,6 +173,8 @@ public:
   bool JavaEnabled(ErrorResult& aRv);
   uint64_t HardwareConcurrency();
   bool CpuHasSSE2();
+  bool CpuHasAVX();
+  bool CpuHasAVX2();
   bool TaintEnabled()
   {
     return false;
diff --git a/dom/webidl/Navigator.webidl b/dom/webidl/Navigator.webidl
index 60ed84d535..f2212de392 100644
--- a/dom/webidl/Navigator.webidl
+++ b/dom/webidl/Navigator.webidl
@@ -211,6 +211,10 @@ partial interface Navigator {
    */
   [ChromeOnly]
   readonly attribute boolean cpuHasSSE2;
+  [ChromeOnly]
+  readonly attribute boolean cpuHasAVX;
+  [ChromeOnly]
+  readonly attribute boolean cpuHasAVX2;
 };
 
 // nsIDOMNavigatorDesktopNotification