Examine source code of GPPS

{
  "name": "GPPS",
  "description": "Google Privacy Page Skip",
  "manifest_version": 2,
  "version": "1.2",
  "icons": {
    "16": "/images/16.png",
    "32": "/images/32.png",
    "48": "/images/48.png",
    "128": "/images/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{04383b72-95e7-4498-88fa-228b67ce9d1a}",
      "strict_min_version": "57.0"
    }
  },
  "permissions": [],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "/images/48.png",
    "default_title": "GPPS",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "https://consent.youtube.com/*"
      ],
      "js": [
        "./js/skip.js"
      ]
    }
  ]
}