Examine source code of GPU profit checker

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "GPU profit checker",
  "description": "Detects GPUs on website and displays possible crypto mining profit.",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "64": "images/icon-64.png",
    "128": "images/icon-128.png"
  },
  "author": "contact@theminerbay.org",
  "homepage_url": "https://theminerbay.org",
  "web_accessible_resources": [
    "window.html"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.min.js",
        "main.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "permissions": [
    "storage",
    "webRequest",
    "https://theminerbay.org/*",
    "https://theminerbay.org/data/extension.json",
    "https://fonts.googleapis.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{93cb8784-aa16-4629-9123-ee6bf1c293ab}"
    }
  }
}