Examine source code of Anti-Procrastination

{
  "manifest_version": 2,
  "name": "Anti-Procrastination",
  "version": "1.0",
  "description": "Reduces the due date of some assignments on ClassCharts to reduce procrastination only works for assignments due after two days(Original due date can be viewed when clicking on the assignment)",
  "icons": {
    "48": "icons/icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.classcharts.com/mobile/*"
      ],
      "js": [
        "antiprocrastination.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{df5e1cb3-4c3a-4cab-b41c-4b12032d845d}"
    }
  }
}