### Website or app

https://lcdev.shaped.ca

### Repro steps

Dev tools not working in FF or Chrome, says "This page doesn't appear to be using react".

React is included via CDN as shown on react website https://reactjs.org/docs/cdn-links.html:
``
	<script crossorigin="anonymous" src="https://unpkg.com/react@17/umd/react.development.js"></script>
``

Web Console on said page says:
``
Download the React DevTools for a better development experience: https://reactjs.org/link/react-devtools
``

### How often does this bug happen?

Every time

### DevTools package (automated)

_No response_

### DevTools version (automated)

_No response_

### Error message (automated)

_No response_

### Error call stack (automated)

_No response_

### Error component stack (automated)

_No response_

### GitHub query string (automated)

_No response_
type: 'fetch-file-with-cache-complete',
              url,
              value,
            },
          });
        };
        fetch(url, {cache: 'force-cache'}).then(
          response => {
            if (response.ok) {
              response
                .text()
                .then(text => resolve(text))
                .catch(error => reject(null));
            } else {
              reject(null);
            }
          },
          error => reject(null),
        );
      }
      break;
    case 'react-devtools-inject-backend':
      const script = document.createElement('script');
      script.src = chrome.runtime.getURL('build/react_devtools_backend.js');
      document.documentElement.appendChild(script);
      script.parentNode.removeChild(script);
      break;
  }
});
window.addEventListener('pageshow', function({target}) {