Examine source code of Dark Mode Toggle v2

{
  "manifest_version": 3,
  "name": "Dark Mode Toggle v2",
  "version": "1.0.0",
  "description": "Simple and lightweight dark mode toggle for any website. Switch between light and dark themes with one click.",
  "permissions": [
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.svg",
      "32": "icons/icon-32.svg",
      "48": "icons/icon-48.svg",
      "96": "icons/icon-96.svg",
      "128": "icons/icon-128.svg"
    },
    "default_title": "Dark Mode Togglev2"
  },
  "icons": {
    "16": "icons/icon-16.svg",
    "32": "icons/icon-32.svg",
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg",
    "128": "icons/icon-128.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{87e07277-55d9-405d-bd16-60264069e341}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}