Examine source code of Ludus Darkmode

{
  "name": "Ludus Darkmode",
  "version": "1.5",
  "manifest_version": 2,
  "author": "Søren Emil Schmidt-Laugesen",
  "icons": {
    "128": "./icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://ludusweb.akat.dk/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    },
    {
      "matches": [
        "https://ludusweb.akat.dk/"
      ],
      "css": [
        "kursist.css"
      ]
    }
  ]
}