# Modify Headers DNR

> Modify request and response headers through the DeclarativeNetRequest API

Canonical page: [https://chrome-stats.com/d/modify-headers-dnr](https://chrome-stats.com/d/modify-headers-dnr)

## Overview

- **ID:** `modify-headers-dnr`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Brawl
- **Category:** web-development
- **Daily users:** 269
- **Weekly downloads:** 5
- **Version:** 3.1.0
- **Last updated:** 2026-06-10
- **First published:** 2024-08-18
- **Size:** 77 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/modify-headers-dnr/)
- **Website:** [https://github.com/Brawl345/modify-headers-dnr](https://github.com/Brawl345/modify-headers-dnr)

## Description

Modify Headers DNR is a powerful Chrome extension that enables you to set, append, and remove HTTP headers on both requests and responses. Utilizing the Manifest V3-compatible DeclarativeNetRequest API, this extension offloads the header modification logic directly to the browser, offering efficient and reliable header control.

Unlike typical header modifiers, Modified Headers DNR ensures compliance with Chrome's latest extension standards while seamlessly handling header changes. Note that modified response headers might not appear in the network console, but they remain applied to your web interactions, enhancing your control over HTTP traffic without additional resource use.

## Rankings

- #7,067 — Overall
- #4 — modify
- #7 — modheader
- #21 — header
- #45 — response
- #125 — request

## Permissions and access

### Permissions

- `declarativeNetRequest`
- `storage`

### Host permissions

- `<all_urls>`

## Safety

- **Risk impact:** Moderate 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 has low user count. Unpopular extensions 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

- [Edit Request Headers](https://chrome-stats.com/d/edit-request-headers) — 2 users
- [Modify HTTP Headers](https://chrome-stats.com/d/modify-http-headers) — 49 users, 5.00 / 5
- [Simple Modify Headers - Extended](https://chrome-stats.com/d/simple-modify-headers-extended) — 299 users, 5.00 / 5
- [Netmirror Extension](https://chrome-stats.com/d/netmirror-extension) — 12,226 users, 4.42 / 5
- [Request Header Modifier](https://chrome-stats.com/d/request-header-modifier) — 39 users, 5.00 / 5
- [HeaderMod](https://chrome-stats.com/d/headermod-app) — 17 users
- [Add request headers](https://chrome-stats.com/d/add-request-headers) — 1 users
- [HeaderMod](https://chrome-stats.com/d/headermod) — 295 users
- [Modify Header Value](https://chrome-stats.com/d/modify-header-value) — 9,553 users, 3.62 / 5
- [ModHeader](https://chrome-stats.com/d/modheader-firefox) — 19,864 users, 3.37 / 5
- [Header Override](https://chrome-stats.com/d/header-override) — 37 users
- [simple-modify-headers](https://chrome-stats.com/d/simple-modify-header) — 5,859 users, 4.62 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/modify-headers-dnr)