Examine source code of LichessARC

{
  "manifest_version": 2,
  "name": "LichessARC",
  "author": "Simon Lammer",
  "description": "Allows accepting a random challenge on Lichess.org",
  "version": "1.2",
  "homepage_url": "https://github.com/SimonLammer/lichess-accept-random-challenge",
  "icons": {
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.lichess.org/*",
        "*://lichess.org/*"
      ],
      "js": [
        "lichessARC.js"
      ],
      "css": [
        "lichessARC.css"
      ]
    }
  ]
}