Examine source code of YouTube Nonstop

{
  "manifest_version": 2,
  "name": "YouTube Nonstop",
  "version": "1.3.14",
  "author": "Cicker",
  "description": "The extension prevents YouTube from stopping videos",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "*://*.youtube.com/*"
  ],
  "icons": {
    "256": "icons/Nonstop.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "256": "icons/Nonstop.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bbb5d18c-4ffe-48b1-afca-55c1571bd06e}"
    }
  }
}