Examine source code of Pure New Tab

{
  "manifest_version": 2,
  "name": "Pure New Tab",
  "description": "A clean and minimalistic new tab page extension",
  "version": "1.2.0",
  "icons": {
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0bdf54d0-7c91-4477-873a-80412ddc5fa4}"
    }
  }
}