Examine source code of YouTube speed android

{
  "manifest_version": 2,
  "name": "YouTube-speed-android",
  "version": "1.1.3",
  "description": "Set default playback speed and control YouTube video speed up to 16x. Mobile-friendly!",
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "src/shared/shared.css",
        "src/content/content.css"
      ],
      "js": [
        "src/shared/utils.js",
        "src/content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "src/background/background.js"
    ]
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.svg",
      "96": "icons/icon-96.svg"
    },
    "default_title": "YouTube Speed Control",
    "default_popup": "src/popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-speed-control@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}