Hi,
I found a solution to set cors of firebase's storage - reference.
Steps:
1. Install gsutil
2.. Add cors.json file in local, for example, put in d:\cors.json
3. Type command "gsutil cors set d:\cors.json gs://exampleproject.appspot.com" in command line window. Replace exampleproject.appspot.com by your storageBucket link.
Example of cors.json, replace * by your domain of application.
[
{
"origin":
["*"],
"method": ["GET"],
"maxAgeSeconds": 3600
}
]