> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/products/cn/agent-browser/yin-qing-yu-zhi-wen.md).

# 引擎与指纹

为你的 Oxylabs Agent Browser 会话选择浏览器引擎和操作系统指纹。

Agent Browser 让你选择由哪个浏览器引擎运行会话，以及它向网站呈现哪个指纹配置文件。两者都通过连接字符串中的查询参数设置：

```bash
wss://USER:PASS@hb.oxylabs.io?p_src=oxybrowser&p_fp_tag=oxyfp_mac_optimized
```

### 浏览器引擎

<table><thead><tr><th width="97">参数</th><th width="463.5">说明</th><th width="74">类型</th></tr></thead><tbody><tr><td><code>p_src</code></td><td>浏览器引擎。设置为 <code>oxybrowser</code> 以使用专有浏览器引擎，所有账户均可用。若省略，则使用标准 Chromium 引擎。</td><td>字符串</td></tr></tbody></table>

### 指纹配置文件

使用 `p_fp_tag` 参数选择一个指纹配置文件：

<table><thead><tr><th width="192">值</th><th>说明</th></tr></thead><tbody><tr><td><code>oxyfp_win</code> <em>（默认）</em></td><td>Windows 指纹。若 <code>p_fp_tag</code> 被省略，则自动应用。</td></tr><tr><td><code>oxyfp_mac</code></td><td>用于常规抓取的标准 macOS 指纹。</td></tr><tr><td><code>oxyfp_mac_optimized</code></td><td>为难以访问的目标调优的 macOS 指纹。仅在与 <code>p_src=oxybrowser</code>.</td></tr><tr><td><code>oxyfp_win_v1</code></td><td>旧版 Windows 配置文件。</td></tr></tbody></table>

{% hint style="info" %}
若要始终使用最新的 Windows 指纹，请省略 `p_fp_tag` 而不是设置 `oxyfp_win_v1`.
{% endhint %}

### 故障排查

不同目标的访问难度不同，因此最佳组合可能不同。对于受保护的目标，请先使用 `p_src=oxybrowser` 和 `p_fp_tag=oxyfp_mac_optimized`。如果仍无法访问，请尝试其他组合：

* 在 Windows 和 macOS 配置文件之间切换。
* 在标准浏览器引擎和专有浏览器引擎之间切换。
* 将它们与地理位置和设备类型调整结合使用。


---

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