Examine source code of Cursor Arrow

{
  "manifest_version": 3,
  "name": "Cursor Arrow",
  "version": "1.1",
  "description": "Shows a red triangle on the left side of the screen, following cursor Y position.",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_title": "Cursor Arrow",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "arrow.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cursor-arrow@ishikawa.moe",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}