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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Check Elements ID",
  "version": "1.0",
  "description": "Verifies if every element on the webpage has an ID and highlights those without IDs.",
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_title": "Check IDs"
  }
}