yepp, mine is crashing as well.
TypeError: Failed to fetch for basically every row in sw.js
But then I press Unregister for that service worker and reloaded the page, then it went fine.. ?
Now I just get this (but only as a warning):
sw.js:318 [SW-Offline] Update check failed: Error: offline.json responded with 404 at UpdateCheck (sw.js:250)