Examine source code of Hide Cursor

{
  "name": "Hide Cursor",
  "description": "Hide the cursor when a shortcut key is pressed",
  "version": "1.0.0",
  "manifest_version": 3,
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3a436cf1-9fa1-447a-af24-dd438567adb2}"
    }
  },
  "options_ui": {
    "page": "options-firefox.html",
    "browser_style": false
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/cursor16.png",
      "32": "/images/cursor32.png",
      "48": "/images/cursor48.png",
      "128": "/images/cursor128.png"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "hidecursor.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "commands": {
    "toggle-hidden": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Toggle weather the cursor is shown"
    }
  },
  "icons": {
    "16": "/images/cursor16.png",
    "32": "/images/cursor32.png",
    "48": "/images/cursor48.png",
    "128": "/images/cursor128.png"
  }
}