--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -90,16 +90,18 @@
 
 #include "base/histogram.h"
 
 #include "mozilla/unused.h"
 
 #ifdef XP_WIN
 #include "nsIWinAppHelper.h"
 #include <windows.h>
+#include <intrin.h>
+#include <math.h>
 #include "cairo/cairo-features.h"
 #include "mozilla/WindowsVersion.h"
 
 #ifndef PROCESS_DEP_ENABLE
 #define PROCESS_DEP_ENABLE 0x1
 #endif
 #endif
 
@@ -4100,16 +4102,27 @@ XREMain::XRE_main(int argc, char* argv[]
 
   nsresult rv = NS_OK;
 
   gArgc = argc;
   gArgv = argv;
 
   NS_ENSURE_TRUE(aAppData, 2);
 
+#if defined(_MSC_VER) && _MSC_VER < 1900 && defined(_M_X64)
+  // Disable CRT use of FMA3 on non-AVX2 processors because of bug 1160148
+  int cpuid0[4] = {0};
+  int cpuid7[4] = {0};
+  __cpuid(cpuid0, 0); // Get the maximum supported CPUID function
+  __cpuid(cpuid7, 7); // AVX2 is function 7, subfunction 0, EBX, bit 5
+  if (cpuid0[0] < 7 || !(cpuid7[1] & 0x20)) {
+    _set_FMA3_enable(0);
+  }
+#endif
+
   // A initializer to initialize histogram collection, a chromium
   // thing used by Telemetry.
   mStatisticsRecorder = MakeUnique<base::StatisticsRecorder>();
 
   mAppData = new ScopedAppData(aAppData);
   if (!mAppData)
     return 1;
   if (!mAppData->remotingName) {