Fix for #1084.

views/_main.html

@@ -11,7 +11,7 @@
         <link rel="apple-touch-icon" sizes="120x120" href="{{ url_for('static',filename='apple-touch-icon.png') }}">
         <link rel="icon" type="image/png" sizes="32x32" href="{{ url_for('static',filename='favicon-32x32.png') }}">
         <link rel="icon" type="image/png" sizes="16x16" href="{{ url_for('static',filename='favicon-16x16.png') }}">
-        <link rel="manifest" href="{{ url_for('static',filename='manifest.json') }}">
+        <link rel="manifest" href="{{ url_for('static',filename='manifest.json') }}" crossorigin="use-credentials">
         <link rel="mask-icon" href="{{ url_for('static',filename='safari-pinned-tab.svg') }}" color="#5bbad5">
         <link rel="shortcut icon" href="{{ url_for('static',filename='favicon.ico') }}">
         <meta name="msapplication-config" content="{{ url_for('static',filename='browserconfig.xml') }}">