Is there a way to use this polyfill from a web page that needs to send messages to an extension?

[BlindDespair]

We need to request some info from our extesnion on our website and want to make it cross-browser, but when I tried using this polyfill to make the messaging work in all supported browsers and it works great for communication inside the extension. But when I try to use it on the web page I get Uncaught Error: This script should only be loaded in a browser extension. and that's really because making this to work in all browsers will be rather difficult.
I saw there's a typeof globalThis != "object" || typeof chrome != "object" || !chrome || !chrome.runtime || !chrome.runtime.id check and the only check web page does not pass is the chrome.runtime.id obviously because it's not an extension. But can I ask what is the motivation for not allowing this polyfill work on web pages as well?
Is there a way to make this work?

[Rob--W]

No, it is not possible to use the polyfill in a web context.

See #326 for more details.