Adding bookmarks to the home screen?

Question

Google

Good evening!
Our feature for the Chrome mobile browser:

And I wanted to implement it on my website.
I do as in the article :

{
  "short_name": "Название",
  "name": "Название",
  "icons": [
    {
      "src": "launcher-icon-3x.png",
      "sizes": "144x144",
      "type": "image/png"
    }
  ],
  "start_url": "/",
  "display": "standalone"
}

and connect the manifest:
<link rel="manifest" href="manifest.json">
But it didn't work. The banner does not appear. Help me please! Maybe I'm missing something...

Answer 1

Read all requirements :

• You have a web app manifest file.
  
• You have a service worker registered on your site.
  
• Your site is served over HTTPS (you need a service worker after all).
  
• The user has visited your site twice over two separate days during the course of two weeks.