Examine source code of AI Chat Cleaner

{
  "manifest_version": 3,
  "name": "AI Chat Cleaner",
  "version": "2.1",
  "description": "Cleans chat history for Claude or Gemini",
  "permissions": [
    "scripting",
    "tabs",
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://gemini.google.com/*",
    "https://claude.ai/*"
  ],
  "action": {
    "default_title": "AI Chat Cleaner",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ai-chat-cleaner@tuanngviet",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://gemini.google.com/*",
        "https://claude.ai/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}