Request scheme 'chrome-extension' is unsupported

[pdw207]

Uncaught (in promise) TypeError: Request scheme 'chrome-extension' is unsupported
at sw.js:formatted:279

[naiborhujosua]

if (handler) {
event.respondWith(handler(event.request));
} else if (router.default && event.request.method === 'GET') {
event.respondWith(router.default(event.request));
}
That else if clause should probably check the protocol of event.request to confirm that it's https: as an additional condition.

check this answer GoogleChromeLabs/sw-toolbox#171