Examine source code of VRC.TL → Datenight

{
  "manifest_version": 3,
  "name": "VRC.TL → Datenight",
  "version": "1.0.0",
  "description": "Import VRChat events from vrc.tl into Datenight calendar",
  "browser_specific_settings": {
    "gecko": {
      "id": "vrctl-datenight@datenight.app",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://vrc.tl/*",
    "https://*/*",
    "http://*/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://vrc.tl/event/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  }
}