Examine source code of Scan Website

{
  "manifest_version": 2,
  "name": "Scan Website",
  "description": "VirusTotal URL Scanner - Stay protected.",
  "version": "1.0.12",
  "icons": {
    "32": "icons/32.png",
    "64": "icons/64.png",
    "128": "icons/128.png",
    "512": "icons/512.png"
  },
  "browser_action": {
    "default_title": "Scan Website",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "contextMenus",
    "notifications",
    "storage",
    "https://*.virustotal.com/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{79a67a64-d5f4-4903-8056-31d6be60a10e}"
    }
  }
}