Repro: 1. Enter a protocol-less URL like `webkit.org` into URL bar (but make sure it doesn't autocomplete from history). 2. Open Web Inspector Audit tab and hit Start. Result: Demo Audit > Specially Exposed Data > Resources > getResourceContent fails. > TypeError: undefined is not an object (evaluating 'mainResource.id') Notes: - HTTPS redirects are the easiest repro scenario, but any redirect should cause the same result.