I'm curious, an operator in Portugal (MEO) has created a kind of application where we can access the client area, but instead of installing it, in the browser we log in and click on the button "Add to main screen "and he creates a direct access icon on his mobile phone, but unlike my sites when I click on this button, it generates an icon in it, but when I open the browser bar appears and in MEO it does not happen anymore when we see the apps open instead of the name of the browser appears "My MEO"
How do I make this type of site?