MockHeader 是一个改写 HTTP 请求 header 与响应 header 的浏览器扩展。
不收集任何数据。 本扩展不收集、不上传、不出售、不转移任何个人信息或使用数据。
数据存在哪里。 你创建的改写规则（包括 header 名称与取值、生效范围设置、界面偏好） 只保存在你自己浏览器的本地存储（chrome.storage.local）里。它们不会离开你的设备， 开发者也没有任何途径读到它们。
网络请求。 本扩展不向任何服务器发起网络请求，没有后端服务，不做统计、埋点或错误上报。
页面内容。 本扩展不读取、不修改网页内容，只按你自己定义的规则改写匹配请求的 header。
导入导出。 导出功能生成的文件由你自己选择保存位置，全程在本地完成，不经过任何服务器。 请注意导出文件可能包含 Cookie、Authorization 等敏感取值，妥善保管。
权限用途。 declarativeNetRequest 用于执行 header 改写；storage 用于保存你的规则； tabs 用于在工具栏角标上显示当前标签页的状态、以及把规则限定到单个标签页； <all_urls> 是因为规则适用于哪些网址完全由你决定，无法预先知道目标主机。
政策变更。 本页内容如有变更，会更新顶部的日期。
反馈渠道。 有疑问或想反馈问题，请在本扩展于 Chrome 应用商店的条目页留言。
MockHeader is a browser extension that rewrites HTTP request and response headers.
No data collection. This extension does not collect, upload, sell or transfer any personal information or usage data.
Where data lives. The rewrite rules you create — header names and values, scope settings, interface preferences — are stored only in your own browser's local storage (chrome.storage.local). They never leave your device, and the developer has no way to read them.
Network requests. This extension makes no network requests. There is no backend service, no analytics, no telemetry and no error reporting.
Page content. This extension does not read or modify page content. It only rewrites headers on requests that match the rules you defined yourself.
Import and export. Exported files are written to a location you pick, entirely on your own machine, without passing through any server. Note that an export may contain sensitive values such as Cookie or Authorization headers — keep it safe.
Permissions. declarativeNetRequest performs the header rewriting; storage keeps your rules; tabs shows per-tab status on the toolbar badge and allows restricting a rule to one tab; <all_urls> is required because only you decide which URLs your rules apply to, so the target hosts cannot be known in advance.
Changes. If this policy changes, the date at the top will be updated.
Feedback. For questions or problem reports, please use this extension's listing page on the Chrome Web Store.