Examine source code of UW Schedule Exporter

{
  "manifest_version": 3,
  "name": "UW Schedule Exporter",
  "version": "1.0",
  "description": "Export UW schedule to calendar",
  "permissions": [
    "activeTab",
    "scripting",
    "downloads"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://my.uw.edu/academics/"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Export UW Schedule"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png",
    "512": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "advaitb@uw.edu"
    }
  }
}