Add it to your home screen and open it like an app.
It is already on your home screen. Open it from there instead of the browser.
On iPhone or iPad: tap Share, then Add to Home Screen.
Use your browser menu to Install app or Add to Home Screen.
Keep this page open until the app icon appears on your home screen.
Look for the icon on your home screen.
The browser is still installing it. Check your home screen in a moment.
You can install it later from the menu.