Examine source code of SAIS Timetable

{
  "manifest_version": 2,
  "name": "SAIS Timetable",
  "description": "Adds a timetable of your classes on the shopping cart page.",
  "version": "1.0.1resigned1",
  "content_scripts": [
    {
      "matches": [
        "https://*.up.edu.ph/*/*",
        "http://*.up.edu.ph/*/*"
      ],
      "js": [
        "bundle.js"
      ],
      "css": [
        "style.css"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{866f966e-6a44-44c3-bdb7-1b9b4ca5f2f5}"
    }
  }
}