Service Worker "save link as..." bug

simple links with href attr

link to image
link to css
link to js
link to JSON generated from cache
link to JSON generated on the fly

links with href and download attr

link to image
link to css
link to js
link to JSON generated from cache
link to JSON generated on the fly

links with href, target="_blank" and header 'content-disposition': 'attachment'

link to JSON generated from cache
link to JSON generated on the fly

a cat to try save image as

cat