=====サンプル=====
*https://firebase.google.com/docs/samples/?hl=ja
==[[iOS]]==
*[https://firebase.google.com/docs/auth/ios/start?hl=ja Auth]
==[[Java]]==
===CROS [https://firebase.google.com/docs/storage/web/download-files?hl=ja Webでファイルのダウンロード]===
----
以下のようなエラーが出る
<pre>
Access to XMLHttpRequest at 'https://firebasestorage.googleapis.com/v0/b/rXXXXXX.jpeg? from origin 'http://localhost:58193' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
</pre>
*cros.json
<pre>