Examine source code of Gemini Message Navigator

{
  "manifest_version": 2,
  "name": "Gemini Message Navigator",
  "version": "1.0.4",
  "description": "DeepSeek 风格侧边导航栏 — 在 Gemini 对话中快速定位您的每一条消息。悬浮展开，点击跳转。",
  "author": "You",
  "permissions": [
    "activeTab",
    "clipboardWrite"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://gemini.google.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-message-navigator@involutionman.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}