Edge 15 added support for Cache-control: immutable (#163)
Edge 15 added support for Cache-control: immutable (#163)

https://wpdev.uservoice.com/forums/257854-microsoft-edge-developer/suggestions/17168363-support-chrome-s-improved-reload-behavior-or-cache
chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,teoli2003/browser-compat-data