Examine source code of Booking.com Destressor

{
  "name": "Booking.com Destressor",
  "version": "1.2resigned1",
  "description": "Makes the search for a room on booking.com less stressful by removing \"5 other people are looking at this\" and similar messages.",
  "content_scripts": [
    {
      "matches": [
        "*://*.booking.com/*"
      ],
      "css": [],
      "js": [
        "destressor.min.js"
      ]
    }
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{0dfb3c4a-07c3-4540-b918-94457aefb0ac}"
    }
  }
}