Examine source code of Chalkpad Bunk Counter

{
  "manifest_version": 2,
  "name": "Chalkpad Bunk Counter",
  "description": "This extension shows you how many classes you can bunk if your attandance is above target attandance",
  "version": "1",
  "content_scripts": [
    {
      "matches": [
        "https://punjab.chitkara.edu.in//Interface/Student/index.php"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "icons": {
    "512": "machine.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac54c703-2e16-43af-b6ce-0f5ed97d9d1c}"
    }
  }
}