# Header Ext

> A browser extension to modify HTTP request/response headers, append cookies, and redirect URLs by rules. Modify HTTP request and response headers like ModHeader.

Canonical page: [https://chrome-stats.com/d/header-ext](https://chrome-stats.com/d/header-ext)

## Overview

- **ID:** `header-ext`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Braden
- **Category:** web-development
- **Daily users:** 2
- **Version:** 0.0.11
- **Last updated:** 2026-08-20
- **First published:** 2026-05-28
- **Size:** 279 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/header-ext/)

## Rankings

- #65,442 — Overall
- #32 — modheader
- #124 — header

## Permissions and access

### Permissions

- `declarativeNetRequest`
- `storage`
- `tabs`

### Host permissions

- `<all_urls>`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> 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

- [HeaderMod](https://chrome-stats.com/d/headermod) — 292 users
- [ModHeader](https://chrome-stats.com/d/modheader-firefox) — 19,864 users, 3.37 / 5
- [Header Override](https://chrome-stats.com/d/header-override) — 38 users
- [OpenHeader](https://chrome-stats.com/d/openheader) — 1 users
- [Header Editor](https://chrome-stats.com/d/simple-header-editor) — 6 users
- [HTTP Header Plugin](https://chrome-stats.com/d/http-header-plugin) — 7 users
- [Header Editor](https://chrome-stats.com/d/header-editor) — 11,998 users, 4.71 / 5
- [xHeader - Modify HTTP headers](https://chrome-stats.com/d/xheader) — 2 users
- [HeaderTweaker](https://chrome-stats.com/d/headertweaker) — 4 users
- [Simple Modify Headers - Extended](https://chrome-stats.com/d/simple-modify-headers-extended) — 300 users, 5.00 / 5
- [Headers](https://chrome-stats.com/d/headers) — 503 users, 5.00 / 5
- [Header Override](https://chrome-stats.com/d/headeroverride) — 7 users

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