Examine source code of Lectio Header Away

{
  "manifest_version": 2,
  "name": "Lectio Header Away",
  "description": "Fjerner headerne for dagene fra Lectio",
  "version": "1.4",
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.lectio.dk/*/SkemaNy.aspx*",
        "https://www.lectio.dk/*/SkemaNy.aspx*",
        "http://www.lectio.dk/lectio/*/SkemaAvanceret.aspx*",
        "https://www.lectio.dk/lectio/*/SkemaAvanceret.aspx*"
      ],
      "js": [
        "LectioHeaderAway.js"
      ],
      "css": [
        "LectioHeaderAway.css"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_icon": "icon19.png",
    "default_title": "Lectio Header Away"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "http://www.lectio.dk/*/SkemaNy.aspx*",
    "https://www.lectio.dk/*/SkemaNy.aspx*",
    "http://www.lectio.dk/lectio/*/SkemaAvanceret.aspx*",
    "https://www.lectio.dk/lectio/*/SkemaAvanceret.aspx*"
  ],
  "content_security_policy": "default-src 'none'; script-src 'self'"
}