# UserAgent & Misc Headers

> Modify User-Agent and inject custom headers per tab.

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

## Overview

- **ID:** `useragent-misc-headers`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Sheentee - Extensions
- **Category:** web-development,privacy-security
- **Daily users:** 1
- **Version:** 1.1
- **Last updated:** 2026-04-28
- **First published:** 2026-01-04
- **Size:** 49 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/useragent-misc-headers/)
- **Website:** [https://github.com/Sheentee/.github](https://github.com/Sheentee/.github)

## Description

Browser extension to allow manipulation of browser User-Agent string and to add custom headers to requests. This can be active for selected tabs. This functionality is useful for certain web application testing steps.

## Rankings

- #113,753 — Overall
- #160 — agent

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `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

- [User-Agent Header Manager](https://chrome-stats.com/d/user-agent-header-manager) — 1 users
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- [Advanced User-Agent](https://chrome-stats.com/d/advanced-user-agent) — 5 users
- [User agent override](https://chrome-stats.com/d/user-agent-override) — 9 users, 1.00 / 5
- [I am not a human](https://chrome-stats.com/d/i-am-not-a-human) — 3 users, 5.00 / 5
- [Change User-Agent](https://chrome-stats.com/d/change-user-agent) — 102 users, 3.50 / 5
- [User-Agent Modifier](https://chrome-stats.com/d/user-agent-modifier) — 8 users, 5.00 / 5
- [User Agent Modifier](https://chrome-stats.com/d/user-agents-modifier) — 3 users
- [User-Agent Swithcer](https://chrome-stats.com/d/custom-user-agent-swithcer) — 4.87 / 5
- [User-Agent Switcher and Manager](https://chrome-stats.com/d/user-agent-string-switcher) — 85,389 users, 4.08 / 5
- [User Agent Switcher](https://chrome-stats.com/d/ua-switcher) — 363 users, 4.48 / 5
- [Custom UserAgent String](https://chrome-stats.com/d/custom-user-agent-revived) — 921 users, 3.53 / 5

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