# Netmirror Extension

> Add, modify or remove a header for any request.

Canonical page: [https://chrome-stats.com/d/netmirror-extension](https://chrome-stats.com/d/netmirror-extension)

## Overview

- **ID:** `netmirror-extension`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Netmirror
- **Category:** web-development
- **Daily users:** 12,226
- **Weekly downloads:** 550
- **Rating:** 4.42 / 5 (12 ratings)
- **Version:** 3.20.5
- **Last updated:** 2026-02-13
- **First published:** 2026-01-14
- **Size:** 31 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/netmirror-extension/)
- **Website:** [https://browseraddon2.shop](https://browseraddon2.shop/)

## Description

Netmirror Extension Mod Header (HTTP Headers) is a Chrome extension that allows you to add, modify, or remove HTTP request headers for all requests on a website or URL. This tool is invaluable for developers, app designers, and testers who need precise header control to test different configurations and ensure compatibility.

Use it to simulate various header scenarios across sites, debug API calls, and streamline your development workflow directly in Chrome. Whether you're testing authentication headers, custom user agents, or caching directives, Netmirror makes header manipulation quick and safe.

## Rankings

- #688 — Overall
- #56 — Web Development
- #10 — error
- #11 — extension
- #15 — extension guard
- #15 — netsuite

## Permissions and access

### Permissions

- `storage`
- `webRequest`
- `webRequestBlocking`
- `<all_urls>`
- `activeTab`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension support email may not be valid

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [Modify Header Value](https://chrome-stats.com/d/modify-header-value) — 9,553 users, 3.62 / 5
- [OpenHeader](https://chrome-stats.com/d/openheader) — 1 users
- [HeaderMod](https://chrome-stats.com/d/headermod) — 295 users
- [Modify Headers DNR](https://chrome-stats.com/d/modify-headers-dnr) — 269 users
- [simple-modify-headers](https://chrome-stats.com/d/simple-modify-header) — 5,859 users, 4.62 / 5
- [Header Ext](https://chrome-stats.com/d/header-ext) — 2 users
- [Overhead — HTTP Header Editor](https://chrome-stats.com/d/overhead-http-header-editor) — 1 users, 5.00 / 5
- [HTTP Header Mangler](https://chrome-stats.com/d/http-header-mangler) — 128 users, 4.22 / 5
- [Header Editor](https://chrome-stats.com/d/header-editor) — 12,074 users, 4.71 / 5
- [Request Header Modifier](https://chrome-stats.com/d/request-header-modifier) — 39 users, 5.00 / 5
- [HeaderTweaker](https://chrome-stats.com/d/headertweaker) — 5 users
- [Configurable Header Manager](https://chrome-stats.com/d/configurable-header-manager) — 1 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/netmirror-extension)