Examine source code of GAG Calculator

{
  "manifest_version": 2,
  "name": "GAG Calculator",
  "version": "1.0.0",
  "description": "Roblox GAG toolbar math: plant value, live preview & history. Unofficial; not Roblox or owners.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f3c2e91-0a4b-4c8d-9e1f-2b6d0c4a8e53}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "GAG Calculator",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "clipboardWrite"
  ]
}