Examine source code of 5s Delayed Screenshot

{
  "manifest_version": 2,
  "name": "5s Delayed Screenshot",
  "version": "1.0",
  "description": "Take a screenshot of the visible page after a 5 second delay and copy to clipboard",
  "browser_specific_settings": {
    "gecko": {
      "id": "5s-delayed-screenshot@firefox",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.svg",
      "32": "icons/icon-32.svg",
      "48": "icons/icon-48.svg",
      "128": "icons/icon-128.svg"
    },
    "default_title": "5 seconds delayed screenshot"
  },
  "icons": {
    "16": "icons/icon-16.svg",
    "32": "icons/icon-32.svg",
    "48": "icons/icon-48.svg",
    "128": "icons/icon-128.svg"
  }
}