Examine source code of GRB PLAYER

{
  "manifest_version": 3,
  "name": "GRB PLAYER",
  "version": "2.2.0",
  "description": "GRB PLAYER - Stream Genesis Radio Birmingham live. Features: station search, favorites, sleep timer, and background playback.",
  "author": "GRB Radio",
  "homepage_url": "https://genesisradiobirmingham.com",
  "action": {
    "default_popup": "popup.html",
    "default_title": "GRB PLAYER",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "grb-player@genesisradiobirmingham.com",
      "strict_min_version": "109.0"
    }
  }
}