# Quick Accept-Language Switcher

> Provides a quick way of changing the HTTP Accept-Language header so you can view and test websites with a different locale.

Canonical page: [https://chrome-stats.com/d/quick-accept-language-switc](https://chrome-stats.com/d/quick-accept-language-switc)

## Overview

- **ID:** `quick-accept-language-switc`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Dan Callahan
- **Category:** web-development,language-support
- **Daily users:** 786
- **Weekly downloads:** 12
- **Rating:** 4.52 / 5 (23 ratings)
- **Version:** 1.2resigned1
- **Last updated:** 2024-04-25
- **First published:** 2013-07-16
- **Size:** 12 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/quick-accept-language-switc/)
- **Website:** [https://github.com/callahad/quick-accept-language-switcher](https://github.com/callahad/quick-accept-language-switcher)

## Description

The **Quick Accept-Language Switcher** Chrome extension provides users with a fast and convenient way to change the HTTP Accept-Language header sent to websites. This enables viewing and testing websites as if browsing from different locales without changing browser or system settings.

Ideal for developers, testers, and multilingual users, it simplifies localization testing by allowing instant switching between languages with just a few clicks. No complex configuration required, this extension enhances your ability to preview website content in various languages directly from your browser environment.

## Rankings

- #3,794 — Overall
- #156 — Language Support
- #21 — quick
- #32 — kitchen
- #106 — switch
- #111 — language

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `http://*/*`
- `https://*/*`

## 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).

## Review summary

Users praise the extension as a simple, effective way to switch Accept-Language and access sites in other languages; it’s lightweight and open source with active bug fixes. Repeated complaints are inconsistent behavior in some tabs/Firefox setups, lack of per-site presets or dropdown history, and imperfect handling of complex Accept-Language header formats.

### Pros

- Simple and easy to use — multiple reviewers say it "works" and does exactly what they need.
- Allows switching Accept-Language so users can access sites in the desired language / get better localized results.
- Lightweight, no-frills tool that solves a specific problem reliably for many users.
- Open source and actively maintained — reviewers note the author fixed bugs.

### Cons

- Inconsistent behavior in some contexts — several users report it doesn't change the header on some tabs or under multi-process (e10s) / certain Firefox versions.
- Missing per-site/domain settings, presets and a dropdown/history for quick reuse — multiple requests for domain-specific values and presets.
- Imperfect handling or presentation of complex/invalid Accept-Language strings (formatting quirks), requiring manual tweaks in some cases.

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Source: [Chrome-Stats](https://chrome-stats.com/d/quick-accept-language-switc)