- https://violentmonkey.github.io/api/gm/#gm_download
- https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL_static
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
const obj = { hello: "world" };
const blob = new Blob([JSON.stringify(obj, null, 2)], {
type: "application/json",