Examine source code of Hide Telegram Main Search

{
  "manifest_version": 2,
  "name": "Hide Telegram Search Bar",
  "version": "1",
  "description": "Hide the search widget on web.telegram.org",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://web.telegram.org/*"
      ],
      "js": [
        "hide-search.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "48": "icon48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hide-telegram-search-bar@finallyfree.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}