Examine source code of Kiji Privacy Proxy Extension

{
  "manifest_version": 3,
  "name": "Kiji Privacy Proxy Extension",
  "version": "1.3.1",
  "description": "Checks for PII before submitting text to AI chat services",
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://chatgpt.com/*",
    "https://chat.openai.com/*",
    "https://claude.ai/*",
    "https://gemini.google.com/*",
    "https://copilot.microsoft.com/*",
    "https://huggingface.co/chat/*",
    "https://chat.mistral.ai/*",
    "https://poe.com/*",
    "https://www.perplexity.ai/*",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "optional_host_permissions": [
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_page": "options.html",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kiji-privacy-proxy@dataiku.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}