Examine source code of YouTube Auto Refresh

{
  "manifest_version": 2,
  "name": "YouTube Auto Refresh",
  "version": "1.0",
  "description": "Automatically refreshes YouTube videos once upon initial load",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/watch*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "*://*.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-auto-refresh@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}