Examine source code of Geoliner

{
  "manifest_version": 2,
  "name": "Geoliner",
  "description": "Улучшения для сайта GeoLin",
  "version": "2.1.1",
  "content_scripts": [
    {
      "matches": [
        "*://geolin.ru/milestones/home/event/*"
      ],
      "js": [
        "milestones.js"
      ],
      "css": [
        "milestones.css"
      ]
    }
  ],
  "icons": {
    "96": "icons/96.png",
    "128": "icons/128.png",
    "256": "icons/256.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{14d0b0fc-9d05-4b31-a8f2-a84c8f98273b}"
    }
  }
}