Examine source code of Radio Room

{
  "manifest_version": 2,
  "name": "Radio Room",
  "version": "1.5",
  "description": "Расширение для прослушивания радио с возможностью добавления своих станций и регулировки громкости.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/radio-16.png",
      "48": "icons/radio-48.png",
      "128": "icons/radio-128.png"
    }
  },
  "icons": {
    "16": "icons/radio-16.png",
    "48": "icons/radio-48.png",
    "128": "icons/radio-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{544117c3-c469-42d8-9bda-24ef0fcaebcf}"
    }
  }
}