Examine source code of Sticky Notes

{
  "manifest_version": 3,
  "name": "Sticky Notes",
  "version": "0.2.1",
  "description": "Add sticky notes to any webpage and share via URL.",
  "action": {
    "default_title": "Toggle sticky notes mode",
    "default_icon": {
      "16": "icons/icon-16.png",
      "19": "icons/icon-19.png",
      "32": "icons/icon-32.png",
      "38": "icons/icon-38.png"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "clipboardWrite"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sticky-notes@example.com",
      "strict_min_version": "109.0"
    }
  }
}