Examine source code of Tube Audio Options+

{
  "description": "Audio only mode for youtube.com and m.youtube.com",
  "manifest_version": 3,
  "name": "Tube Audio Options+",
  "homepage_url": "https://github.com/schdie/we_firefox_ytop_mv3",
  "version": "53",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://*.googlevideo.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "js/yt.js"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/service.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "js/yt.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0cc0b5b4-e2a6-410d-832e-00db8654e077}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}