Add CORS configuration for your Firebase Storage

Firebase is using the same storage infrastructure as google cloud .

1. Go to https://console.cloud.google.com and select the dashboard of the project that contains the firebase storage.

2. On the top right, there will be a button named "Activate Cloud Shell", click on it, a terminal will open on the bottom of the page

Click on Open Editor

Click on File, and New file. 

3.Create new file with name cors.json, paste the following save.

[
  {
    "origin": ["*"],
    "method": ["GET"],
    "maxAgeSeconds": 3600
  }
]

4.On your Firebase Console and select "Storage" and  get your storage bucket URL (e.g gs://)

5.Then open the terminal again and paste following

       gsutil cors set cors.json gs://<your-cloud-storage-bucket>         

The CORS error should be gone for Storage for which we added the configuration. It wont be applied to other storage bucket