--- a/dom/canvas/WebGLExtensionDrawBuffers.cpp
+++ b/dom/canvas/WebGLExtensionDrawBuffers.cpp
@@ -43,21 +43,18 @@ WebGLExtensionDrawBuffers::DrawBuffersWE
     mContext->DrawBuffers(buffers);
 }
 
 bool
 WebGLExtensionDrawBuffers::IsSupported(const WebGLContext* webgl)
 {
     gl::GLContext* gl = webgl->GL();
 
-    if (!gl->IsExtensionSupported(gl::GLContext::ARB_draw_buffers) &&
-        !gl->IsExtensionSupported(gl::GLContext::EXT_draw_buffers))
-    {
+    if (!gl->IsSupported(gl::GLFeature::draw_buffers))
         return false;
-    }
 
     // WEBGL_draw_buffers requires at least 4 color attachments.
     if (webgl->mGLMaxDrawBuffers < webgl->kMinMaxDrawBuffers ||
         webgl->mGLMaxColorAttachments < webgl->kMinMaxColorAttachments)
     {
         return false;
     }