Interestingly, there is a dark side to the "hot" status.
A "hot" icon is one that is fetched immediately during the service worker installation. It is not lazy-loaded. Serving this icon with a Cache-Control: max-age=31536000 header ensures it remains in the user's browser cache forever, making subsequent loads instant. icon192x192png hot
Against his better judgment, Leo forced the file open. The screen didn’t show a logo or an app icon. Instead, it was a shifting kaleidoscope of impossible oranges and searing whites. It looked like a close-up of a solar flare, trapped in a tiny square. Interestingly, there is a dark side to the "hot" status