--- a/gfx/angle/src/libANGLE/moz.build
+++ b/gfx/angle/src/libANGLE/moz.build
@@ -354,16 +354,22 @@ if CONFIG['GNU_CXX']:
             '-Wno-unused-private-field',
         ]
     else:
         CXXFLAGS += [
             '-Wno-shadow-compatible-local',
             '-Wno-shadow-local',
         ]
 
+if CONFIG['_MSC_VER'] and not CONFIG['CLANG_CL']:
+    CXXFLAGS += [
+        '-wd4018', # '>' : signed/unsigned mismatch
+        '-wd4530', # C++ exception handler used, without /EHsc
+    ]
+
 if CONFIG['MOZ_DIRECTX_SDK_PATH'] and not CONFIG['MOZ_HAS_WINSDK_WITH_D3D']:
     LOCAL_INCLUDES += ['%' + '%s/include/' % CONFIG['MOZ_DIRECTX_SDK_PATH']]
 
 DEFINES['_CRT_SECURE_NO_DEPRECATE'] = True
 DEFINES['_HAS_EXCEPTIONS'] = 0
 
 if not CONFIG['MOZ_DEBUG']:
     DEFINES['_SECURE_SCL'] = 0