Add version information for updateViaCache for Firefox and Chrome (#3075)
Add version information for updateViaCache for Firefox and Chrome (#3075)

Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=1353636

Chrome:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/RwjXGTAbuuA
https://developers.google.com/web/updates/2018/06/fresher-sw
chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data