# Sider - Chrome Extension Security Audit & Unpacked ZIP Download

> **CRX8 Security Inspection & Official Download Hub**  
> **Category**: AI & Productivity | **Version**: 4.8.8 | **Rating**: 4.9 / 5.0 (28900 ratings) | **Users**: 3,000,000+  
> **Safety Score**: 9.3 / 10 (高 (全球数百万企业白领信赖))  
> **Updated**: 2026年11月 | **Package Size**: 8.40 MiB  
> **Official Page**: https://crx8.com/ext/sider-chatgpt-sidebar

## Overview & Verified Verdict
Verified AI & Productivity extension. Security Score: 9.3/10, Rating: 4.9★ (28900 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":"storage","desc":"保存自定义提示词与对话上下文历史","risk":"无风险"},{"perm":"contextMenus","desc":"鼠标右键快速呼出 AI 解释与改写","risk":"体验必须"}]

## Key Features & Highlights
- 在屏幕右侧常驻折叠侧边栏，支持多模型（GPT-4o、Claude 3.5 Sonnet、Gemini 1.5 Pro）一键切换对比
- 选中网页任何文字自动弹出悬浮微型快捷栏：支持一键解释、翻译、润色、查错与重写
- 支持对长达数万字的 PDF 文档或 YouTube 视频发起深度对话式问答（ChatPDF / ChatVideo）
- 内置数十套针对跨境邮件、小红书文案、程序员代码评审的专业 Prompt 预设

## Pros & Cons
### Pros
- 交互体验极其丝滑，侧边栏设计完全不遮挡网页主体内容
- 支持自带官方 API Key 免订阅使用，自由度极高

### Cons
- 插件功能极为强大导致体积较大，且官方高级点数需内购订阅

## Recommended Alternatives
- Monica AI助手: 两者为同类直接竞品，Sider 在多模型自由切换与自定义 Prompt 深度上口碑极佳

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