When a HTTP redirect is cached, the generated HAR does not include HTTP headers for the cached entry. Therefore, there is no way to determine which destination URL if this redirect. Here is an example of the response: "response": { "status": 301, "statusText": "Moved Permanently", "httpVersion": "HTTP/1.1", "headers": [], "cookies": [], "content": { "size": 0, "mimeType": "text/html" }, "redirectURL": "", "headersSize": 32, "bodySize": 0 }, It will be more useful if the "headers" are populated. If that is not possible, it is still useful if only the "redirectURL" is populated.
Closing as invalid, as this bug pertains to the old inspector UI and/or its tests. Please file a new bug (https://www.webkit.org/new-inspector-bug) if the bug/feature/issue is still relevant to WebKit trunk.