Examine source code of Chill Radio

{
  "name": "__MSG_app_extension_name__",
  "manifest_version": 2,
  "version": "2.8.1",
  "homepage_url": "https://chillradio.rf.gd",
  "description": "__MSG_app_extension_description__",
  "background": {
    "scripts": [
      "ff/worker.js"
    ]
  },
  "icons": {
    "16": "/assets/icons/logo16.png",
    "32": "/assets/icons/logo32.png",
    "48": "/assets/icons/logo48.png",
    "128": "/assets/icons/logo128.png"
  },
  "browser_action": {
    "default_title": "__MSG_app_extension_name__",
    "default_popup": "ff/popup.html",
    "default_icon": {
      "16": "/assets/icons/logo16.png",
      "32": "/assets/icons/logo32.png",
      "48": "/assets/icons/logo48.png",
      "128": "/assets/icons/logo128.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "incognito": "spanning",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c99b6f8-8094-4774-b918-9c8d2818cb8b}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}