What happens between pasting a URL and getting a content identifier back.
route/index.html, every link and asset reference is rewritten to point inside the copy, and attributes that would break on a different origin (subresource integrity, cross-origin flags) are removed. Sites that fetch their content from an API after loading get a small shim that replays the responses captured during the crawl, so the page does not go blank.The result is served from a subdomain gateway, for example https://<cid>.ipfs.inbrowser.link/, because the copy keeps its links root-relative and needs / to be the site root.