Unclear statement: "which seem to fetch the same assets"

[goemic]

This sounds like these requests (initated by the service worker's "install" event) are not accessing the network and instead accessing the browser cache. Is this correct?

But usually, requests which are served from the browser cache (disk cache/memory cache) don't display the size of the response. They display disk cache/memory cache instead. This is what I would expect, since these requests have been executed and their responses have been received, shortly before the "install" event has executed them again.

I'm a little bit confused here right now, please bring some light into my world :)

Another confusing point is that the request for the service-worker.js file displays size: 0B. Not sure what this should tell me.. the actual file is definetely bigger ;-)