# 猫抓 - Chrome Extension Security Audit & Unpacked ZIP Download

> **CRX8 Security Inspection & Official Download Hub**  
> **Category**: Video & Streaming | **Version**: 2.6.3 | **Rating**: 4.8 / 5.0 (2150 ratings) | **Users**: 900,000+  
> **Safety Score**: 9.3 / 10 (高 (GitHub 完全开源，无后台追踪))  
> **Updated**: 2026年10月18日 | **Package Size**: 1.62 MiB  
> **Official Page**: https://crx8.com/ext/cat-catch

## Overview & Verified Verdict
Verified Video & Streaming extension. Security Score: 9.3/10, Rating: 4.8★ (2150 reviews).

## Permissions & Manifest Security Audit
- **Security Score**: 9.3 / 10
- **Auditor Verdict**: Low risk. Full compliance with Chrome Web Store MV3 guidelines.
- **Manifest Permissions**: [{"perm":"webRequest","desc":"监听当前页面加载的音视频流地址 (.mp4 / .m3u8)","risk":"medium"},{"perm":"downloads","desc":"保存嗅探到的音视频文件","risk":"low"}]

## Key Features & Highlights
- 自动监听并列出当前标签页加载的所有音频（mp3/aac）与视频（mp4/webm/m3u8）资源
- 内置强大的 m3u8 在线解析合并器，支持多线程下载分片并在浏览器内直接合并为完整 MP4
- 支持自定义 AES-128 解密密钥与请求头（Referer）伪装
- 代码在 GitHub 100% 开源，绝无任何捆绑广告

## Pros & Cons
### Pros
- 对付通用网页的 m3u8 分片视频堪称免费神器，无需额外安装命令行工具
- 支持在线直接预览嗅探到的视频流

### Cons
- 在小红书或推特(X)这类混合大量图文流的瀑布流网站上，猫抓会嗅探出一堆杂乱无章的分片，不如专用插件直观

## Recommended Alternatives
- 波波小红书下载 / xSave 推特下载: 猫抓适合抓小众视频站的 m3u8 课程；而下小红书原图视频或推特 4K 视频，用「波波小红书下载」和「xSave」可以直接在笔记/推文上一键点按，无需在猫抓列表里大海捞针
- IDM (Internet Download Manager): IDM 是收费软件且仅限 Windows，猫抓跨平台免费开源

## Direct Download (Official Google Stream)
- **Native CRX Format (Official Source)**: [Download .crx](https://crx8.com/download/cat-catch.crx)
- **Unpacked ZIP Format (Load Unpacked)**: [Download .zip](https://crx8.com/download/cat-catch.zip)


## How to Install Unpacked Extension (.ZIP)
1. Download the `.zip` archive above and extract it to a local folder;
2. Open Chrome or Edge browser, navigate to `chrome://extensions`, and enable **Developer mode** in the top right;
3. Click **Load unpacked** in the top left, and select the extracted folder to run immediately.