Examine source code of Twitter (X) sort by likes

{
  "manifest_version": 2,
  "name": "Twitter (X) sort by likes",
  "version": "1.2",
  "description": "A simple extension that automatically selects the \"Sort replies by: Likes\" filter under tweets when you scroll down to the replies.\n Please note: The replies will only filter once the filter button is rendered on screen, this requires scrolling down to the replies and the replies will refresh once the filter is applied.",
  "permissions": [
    "scripting"
  ],
  "icons": {
    "48": "icons/likes-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.x.com/*"
      ],
      "js": [
        "sortbylikes.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{aed40f39-ee14-4b65-96d9-5e983a2bee2c}"
    }
  }
}