Examine source code of Squatch SEO Tools

{
  "manifest_version": 3,
  "name": "Squatch SEO Tools",
  "description": "Pulls SEO data points and displays them all in one, easy-to-use interface.",
  "version": "1.0.1",
  "icons": {
    "48": "assets/logo-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@squatch-seo.com"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Squatch SEO Tools"
  },
  "permissions": [
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "*://*/*"
  ]
}