Examine source code of aisis-ical

{
  "manifest_version": 2,
  "name": "aisis-ical",
  "description": "Export your class calendar to a format you can import to Google Calendar",
  "version": "0.1.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{71ae5478-5e00-4f3d-8b68-bd76bf5aeebc}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://aisis.ateneo.edu/j_aisis/J_VMCS.do",
        "*://aisis.ateneo.edu/j_aisis/confirmEnlistment.do"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}