Examine source code of Custom Host Banner

{
  "name": "Custom Host Banner",
  "version": "0.1.1",
  "description": "Display a custom banner on the page based on the host.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "page.js"
      ],
      "css": [
        "page.css"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "options.html",
    "default_icon": {
      "16": "images/banner16.png",
      "32": "images/banner32.png",
      "48": "images/banner48.png",
      "128": "images/banner128.png"
    }
  },
  "icons": {
    "16": "images/banner16.png",
    "32": "images/banner32.png",
    "48": "images/banner48.png",
    "128": "images/banner128.png"
  },
  "options_page": "options.html",
  "manifest_version": 2
}