Examine source code of Check SEO Rank

{
  "manifest_version": 3,
  "name": "Check SEO Rank",
  "version": "2.7",
  "description": "Instant Moz DA, PA, Ahrefs DR, Spam Score, Backlinks, and WHOIS metrics for any website.",
  "author": "Check SEO Rank (https://checkseorank.com)",
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@checkseorank.com",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icon.png",
        "icon16.png",
        "icon32.png",
        "icon48.png",
        "icon128.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}