Examine source code of Prompt Leak Guard

{
  "manifest_version": 3,
  "name": "Prompt Leak Guard",
  "short_name": "Leak Guard",
  "version": "0.1.3",
  "description": "Local-only prompt scanner that catches secrets, tokens, and private data before you send them to AI chats.",
  "action": {
    "default_popup": "popup.html",
    "default_title": "Prompt Leak Guard"
  },
  "options_page": "options.html",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "prompt-leak-guard@dankerbadge.tools",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://chat.openai.com/*",
        "https://chatgpt.com/*",
        "https://claude.ai/*",
        "https://gemini.google.com/*",
        "https://www.perplexity.ai/*"
      ],
      "js": [
        "src/license-public-key.js",
        "src/license.js",
        "src/detectors.js",
        "src/content.js"
      ],
      "css": [
        "styles/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}