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manifest.json
{
  "manifest_version": 3,
  "name": "Dev Peek",
  "version": "1.1",
  "description": "Highlight and inspect UI elements on hover.",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_icon": {
      "16": "icons/eye.png",
      "48": "icons/eye48x48.png",
      "128": "icons/eye128.png"
    },
    "default_title": "Dev Peek"
  },
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}