Examine source code of YouTube Embed Converter

{
  "manifest_version": 2,
  "name": "YouTube Embed Converter",
  "version": "1.0",
  "description": "Converts YouTube video to embed format on click.",
  "permissions": [
    "tabs",
    "*://*.youtube.com/*"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icon-48.png",
      "96": "icon-96.png"
    },
    "default_title": "Convert to Embed"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f3fd70b-540a-4a4b-9bcf-69010057f90c}"
    }
  }
}