Update README.md

wkh237 · web-flow · commit e844ae3676f5 · 2016-08-13T21:07:38.000+08:00
diff --git a/README.md b/README.md
@@ -692,6 +692,8 @@ After `0.8.0` we've made some [Web API polyfills](https://github.com/wkh237/reac
 - Blob
 - XMLHttpRequest (Use our implementation if you're going to use it with Blob)
 
+Here's a [sample app](https://github.com/wkh237/rn-firebase-storage-upload-sample) that uses polyfills to upload files to FireBase.
+
 ### Performance Tips
 
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