Quick Accept-Language Switcher

Name: Quick Accept-Language Switcher
Rating: 4.5 (22 reviews)
Author: Dan Callahan

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

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Features & Capabilities

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.

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

1.2resigned1 Last updated: 2024-04-25

Version code:

5726252

Creation date:

2013-07-16

Risk:

Permissions:

webRequest
webRequestBlocking
http://*/*
https://*/*

Size:

12.19KB

URLs:

Website

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 3,631 ▲ 38

Other rankings

#148 in Language Support

#18 in quick keyword 49

#30 in kitchen keyword 2 ▼ 1

#104 in switch keyword 28 ▼ 1

#111 in language keyword 44

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For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Dan Callahan

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/quick-accept-language-switc/

Website:

https://github.com/callahad/quick-accept-language-switcher

User Reviews

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.

Recent reviews

works great, just switch to language you want and go browsing. Why didn't Mozilla add something like it long ago? Sometimes you need to switch languages for optimal web results.

by Fi*****, 2025-11-08

by 远离*****, 2025-03-30

by 退出*****, 2025-02-26

View all user reviews ›

Is Quick Accept-Language Switcher Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Quick Accept-Language Switcher requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Quick Accept-Language Switcher has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
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