Examine source code of TakeUForward Cleaner

{
  "manifest_version": 3,
  "name": "TakeUForward Cleaner",
  "version": "2.0",
  "description": "Hides sidebars and expands main content on TakeUForward.",
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "takeuforward_cleaner@example.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://takeuforward.org/*",
        "https://www.takeuforward.org/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_start"
    }
  ]
}