Examine source code of Cross-Origin Resource

{
  "manifest_version": 2,
  "name": "Cross-Origin Resource Check",
  "version": "1.0.0",
  "description": "Inspect the current page for cross-origin resources and potential CORS/referrer/mixed-content issues. Client-side, read-only scan.",
  "permissions": [
    "activeTab",
    "tabs",
    "contextMenus",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_title": "Cross-Origin Resource Check",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cross-origin-resource-check@example.com",
      "strict_min_version": "102.0"
    }
  }
}