Examine source code of X Reply Sort

{
  "manifest_version": 3,
  "name": "X Reply Sort",
  "version": "1.0.0",
  "minimum_chrome_version": "111",
  "description": "Set a default reply sorting mode for X/Twitter post pages.",
  "browser_specific_settings": {
    "gecko": {
      "id": "x-reply-sort@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*"
  ],
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "action": {
    "default_title": "X Reply Sort",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "128": "images/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "x-route-hook.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "settings-bridge.js"
      ],
      "run_at": "document_start"
    }
  ]
}