Fetch domain | fulfillRequest method | intercept image query

[Александр Петров]

Requests intercepted by the client, require in response:

requestId
responseCode
body

Where `body` — is a base64 string, what is not said in the documentation.
I learned it from this example.

But what about url requests that upload pictures?

Can you give an example when the method "fulfillRequest" is provided with an answer containing a picture that the browser always asks how "favicon.ico"?