Examine source code of Canonical Checker

{
  "manifest_version": 2,
  "name": "Canonical Checker",
  "version": "102",
  "description": "Check the canonical URL of any page, compare it with the current URL, and inspect SEO meta tags.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e00d7822-13fa-4b90-8383-b455293516fe}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "96": "icon96.png",
      "128": "icon128.png"
    },
    "default_title": "Canonical Checker",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs",
    "activeTab"
  ]
}