Examine source code of CodeFrame

{
  "manifest_version": 2,
  "name": "HTML/CSS/JS Editor",
  "version": "2.0",
  "description": "Editor de HTML, CSS e JS!!!",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon-48.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{8e5c4b10-1d6a-4f9d-bb3c-4e5d7a7b7c3a}",
      "strict_min_version": "109.0"
    }
  }
}