# User Agent Masquerade

> Adds a button to the toolbar to switch the User-Agent header.

Canonical page: [https://chrome-stats.com/d/user-agent-masquerade](https://chrome-stats.com/d/user-agent-masquerade)

## Overview

- **ID:** `user-agent-masquerade`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Nobuyuki Honda
- **Category:** web-development,other
- **Daily users:** 57
- **Weekly downloads:** 1
- **Rating:** 4.14 / 5 (7 ratings)
- **Version:** 0.3.1
- **Last updated:** 2024-04-21
- **First published:** 2017-10-20
- **Size:** 15 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/user-agent-masquerade/)
- **Website:** [https://www.nk2.org/amo.html](https://www.nk2.org/amo.html)

## Description

**User Agent Masquerade** is a handy Chrome extension that adds a convenient button to your browser toolbar, allowing you to switch the User-Agent header with ease. It enables users, developers, and testers to quickly change how websites identify your browser, helping with compatibility testing, privacy, or accessing specific web content.

Although lightweight and simple, the extension supports theme-aware icon coloring by setting `svg.context-properties.content.enabled` to true in `about:config`. This helps integrate the extension's appearance with your browser's theme for a cohesive user experience. Ideal for anyone needing fast and flexible user-agent management directly from their toolbar.

## Rankings

- #15,085 — Overall
- #23 — agent
- #42 — query
- #51 — agenda

## Permissions and access

### Permissions

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

## Safety

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

- [Referrer Switch](https://chrome-stats.com/d/referrer-switch) — 116 users, 4.40 / 5
- [User Agent Switcher](https://chrome-stats.com/d/user_agent_switcher) — 1 users
- [HHSwitcher](https://chrome-stats.com/d/hhswitcher) — 5 users, 4.50 / 5
- [User Agent Switcher](https://chrome-stats.com/d/ua-switcher) — 355 users, 4.48 / 5
- [user-agent-rewriter](https://chrome-stats.com/d/user-agent-rewriter4) — 1 users
- [uberAgent ESA](https://chrome-stats.com/d/uberagent-esa) — 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](https://chrome-stats.com/d/uaswitcher) — 61,494 users, 4.33 / 5
- [User agent override](https://chrome-stats.com/d/user-agent-override) — 8 users, 1.00 / 5
- [User-Agent Switcher](https://chrome-stats.com/d/user-agent-switcher-revived) — 14,031 users, 3.93 / 5
- [User-Agent Switcher and Manager](https://chrome-stats.com/d/user-agent-string-switcher) — 83,517 users, 4.08 / 5

---

Source: [Chrome-Stats](https://chrome-stats.com/d/user-agent-masquerade)