Examine source code of Site Sound Labels

{
  "manifest_version": 3,
  "name": "Site Sound Labels",
  "version": "1.0",
  "description": "Label sites by their sound type.",
  "permissions": [
    "tabs"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sitesoundlabels@example.com",
      "strict_min_version": "58.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}