Examine source code of myTime to Calendar

{
  "manifest_version": 3,
  "name": "myTime to Calendar",
  "version": "1.1.0",
  "description": "Export Target myTime schedules to Google Calendar or .ics files.",
  "host_permissions": [
    "https://mytime.target.com/*",
    "https://www.googleapis.com/*",
    "https://oauth2.googleapis.com/*"
  ],
  "permissions": [
    "identity",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mytime-to-calendar@thisguygil.com",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "shared/calendarUtils.js",
      "background/auth.js",
      "background/calendarApi.js",
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://mytime.target.com/*"
      ],
      "js": [
        "shared/calendarUtils.js",
        "shared/settings.js",
        "content/data/parseShifts.js",
        "content/ui/topBar.js",
        "content/ui/manageShiftMenu.js",
        "content/main.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup/index.html",
    "default_title": "Target Calendarizer"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}