Examine source code of X Recommendations Remover

{
  "manifest_version": 3,
  "name": "X Recommendations Remover",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b84cc292-a95b-479a-bc24-f42daeca4f23}"
    }
  },
  "version": "1.0",
  "description": "Removes recommendation sidebars (Who to follow, Trends, etc.)",
  "icons": {
    "48": "icons/icon-48.jpg",
    "120": "icons/icon-120.jpg"
  },
  "permissions": [],
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*",
        "*://www.twitter.com/*",
        "*://x.com/*",
        "*://www.x.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_idle"
    }
  ]
}