Examine source code of Pixterial Tab

{
  "manifest_version": 2,
  "name": "Pixterial Tab",
  "version": "1.2",
  "description": "A minimal new tab page with clock and themes.",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "icons": {
    "128": "icons/icon128.png"
  },
  "permissions": [
    "geolocation"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pixterialtab@ivaishnavraj",
      "strict_min_version": "78.0"
    }
  }
}