Examine source code of Youtube URL Progress Save

{
  "manifest_version": 2,
  "name": "Youtube Remember",
  "version": "2.0",
  "description": "When pausing a Youtube video, it will change the URL to be for the specific time when you paused the video, allowing you to continue watching later, even after restarting the browser",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "256": "icons/256.png"
  },
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "browser_action": {
    "default_popup": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "youtube.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2849fc9-8daf-4a5d-a3c5-019295b8b53e}"
    }
  }
}