Examine source code of Volume Master Lite

{
  "manifest_version": 2,
  "name": "Volume Master Lite",
  "version": "1.1",
  "description": "Simple volume controller placeholder (AMO-ready, no data collection).",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Volume Master"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "volume-master-0940870768@addon",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}