Examine source code of Lectio RPG

{
  "manifest_version": 2,
  "name": "Lectio RPG",
  "version": "1.0.5resigned1",
  "description": "Ændrer lectios tema så den passer med et RPG tema.",
  "icons": {
    "48": "Images/Icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.lectio.dk/lectio/*"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "lectioRPG.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1edbfdbd-d851-426d-bcd0-8955c5e8b5d1}"
    }
  }
}