Examine source code of Fullscreen Cursor Hider

{
  "manifest_version": 3,
  "name": "Fullscreen Cursor Hider",
  "version": "1.1.0",
  "description": "Hides the mouse cursor in fullscreen, reveals it on mouse movement, then hides it again after two seconds of inactivity.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b2f9ed3b-cf03-4fd2-8c6f-8617ac04607a}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "cursor-hider.js"
      ],
      "css": [
        "cursor-hider.css"
      ],
      "css_origin": "user",
      "run_at": "document_start",
      "all_frames": true,
      "match_about_blank": true
    }
  ]
}