I am making a CORS xhr request. This works fine in chrome, however when I run in safari I get an \'Can not load ---- access not allowed by Access-control-allow-origin\'.
For CORS request you should be using your origin fflog.storage.googleapis.com. If you use common storage.googleapis.com origin, any site can access to your bucket.
have try try remove overrideMimeType? If you set mime type, it will return correctly.
I also have problem with Safari POST request, but no answer yet. GET is OK.