Examine source code of Chat GPT DOM Optimizer

{
  "name": "Chat GPT DOM Optimizer",
  "description": "Automatically removes old messages from DOM, improving performance and memory usage in long conversations",
  "manifest_version": 3,
  "version": "0.1",
  "icons": {
    "16": "icons/dom-optimizer-16.png",
    "48": "icons/dom-optimizer-48.png",
    "128": "icons/dom-optimizer-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*"
      ],
      "js": [
        "dom_optimizer.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_icon": {
      "16": "icons/dom-optimizer-16.png",
      "32": "icons/dom-optimizer-32.png",
      "48": "icons/dom-optimizer-48.png",
      "128": "icons/dom-optimizer-128.png"
    },
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@chatgpt-dom-optimizer",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}