DevTools don’t show server response delays when requests are served via a service worker
It looks like Firefox’s DevTools, both the Network tab and profiler, don’t show the server response time when there is a Service Worker involved. Everything is shown at 0ms.
Is that expected and is there any way around it?
The attached screenshot shows the Network tab in the DevTools. All times in the timeline column are shown at 0ms, and all requests have transited via the service worker.