Examine source code of Course Planner for KMITL

{
  "manifest_version": 3,
  "name": "Course Planner for KMITL",
  "description": "Weekly timetable planner for KMITL pre registration course selection.",
  "version": "1.3.0",
  "icons": {
    "16": "/icon/16.png",
    "32": "/icon/32.png",
    "48": "/icon/48.png",
    "96": "/icon/96.png",
    "128": "/icon/128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://regis.reg.kmitl.ac.th/*",
    "https://api.reg.kmitl.ac.th/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "kmitl-course-planner@txasw.github.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://regis.reg.kmitl.ac.th/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/regis.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content-scripts/regis.css"
      ],
      "use_dynamic_url": true,
      "matches": [
        "https://regis.reg.kmitl.ac.th/*"
      ]
    }
  ]
}