Uncaught (in promise) FirebaseError: Remote Config: Error thrown when opening storage. Original error: A mutation operation was attempted on a database that did not allow mutations.. (remoteconfig/storage-open).

[artursOs]

Describe your environment

• Operating System version: macOS 11.5.2
• Browser: Firefox 91.0.2 (private mode)
• Firebase SDK version: 9.0.1 (and newer)
• Firebase Product: firebase/remote-config

Describe the problem

In Firefox private mode and other browsers that don't support IndexDb.
Impossible to catch exception.

example code

import { getRemoteConfig } from 'firebase/remote-config'
....
try {
  config = getRemoteConfig()
} catch(e) {
// do some workaround here
}

console output

Uncaught (in promise) FirebaseError: Remote Config: Error thrown when opening storage. Original error: A mutation operation was attempted on a database that did not allow mutations.. (remoteconfig/storage-open).

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[hsubox76]

We had a PR to add an isSupported() check to remote config that was never merged (#3623). It's somewhat outdated now so I will update and have it reviewed again.