Examine source code of Youtube Unshorten

{
  "manifest_version": 2,
  "name": "Youtube Unshorten",
  "version": "2.0",
  "description": "redirects yotube shorts to regular player",
  "icons": {
    "48": "icons/noshort-48.png",
    "96": "icons/noshort-96.png"
  },
  "permissions": [
    "storage",
    "webRequest",
    "*://*.youtube.com/shorts/*",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/noshort-19.png",
      "38": "icons/noshort-38.png"
    },
    "default_title": "Unshorten Youtube"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3cf9a2a-c732-4c57-be69-49175be7d95e}"
    }
  }
}