Examine source code of Tabz Refresher

{
  "manifest_version": 2,
  "name": "Tabz Refresher",
  "version": "7.7.6",
  "description": "Automatically refresh all tabs at intervals",
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aa7c0b98-9290-4101-b079-ebcbbfe42ec2}",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}