### Website or app

reactjs.org

### Repro steps

1. Install React DevTools v4.20.0 in Firefox
2. Load reactjs.org in Firefox
3. Open Firefox DevTools
4. Observe error in console

![image](https://user-images.githubusercontent.com/1271509/137547605-e6ad3045-c20a-4828-9895-af46b8bb4db1.png)


### How often does this bug happen?

Every time

}
    case 'internal': {
      
      
      
      
      
      checkForInstalledExtension(LOCAL_EXTENSION_ID).then(isInstalled => {
        if (isInstalled) {
          callback(true);
        } else {
          callback(false);
        }
      });
      break;
    }
    case 'local': {
      if (__DEV__) {
        
        
        
        callback(false);
        break;
      }
      
      
      
      
      console.error(UNRECOGNIZED_EXTENSION_ERROR);
      chrome.devtools.inspectedWindow.eval(