Examine source code of SuperLibrus

{
  "manifest_version": 2,
  "name": "SuperLibrus",
  "description": "Pomaga w obsłudze Librusa.",
  "version": "0.2.1",
  "icons": {
    "64": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.librus.pl/nieobecnosci/wykaz_uczeszczania/*"
      ],
      "js": [
        "attendanceReportPage.js"
      ]
    }
  ],
  "developer": {
    "name": "Andrzej Wódkiewicz",
    "url": "https://github.com/akwodkiewicz/super-librus"
  }
}