User-Agent Switcher Firefox

User-Agent Switcher

By: Linder
Quickly and easily switch between popular user-agent strings.

Features & Capabilities

User-Agent Switcher is a versatile Chrome extension that allows users to quickly and easily switch between 26 popular user-agent strings. It features a convenient toolbar popup UI divided into four rows: mobile user-agents, desktop user-agents, desktop operating systems, and control options. Users can toggle user-agents after reloading the page, edit or copy the current user-agent, and specify particular URLs or domains for applying custom user-agents.

The extension also provides a status bar within the popup for real-time information and supports modifying default user-agents directly from the toolbar panel. For users needing custom user-agent strings, the developer offers another complementary addon. This extension is ideal for developers, testers, and privacy-conscious users who need to simulate different browsing environments with ease.

User Growth & Download Statistics

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:
Linder
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/user-agent-switcher-revived/
Email:
dr*****@yahoo.com
Website:
https://mybrowseraddon.com/useragent-switcher.html

Permission Change History

2025-02-28: Version 0.3.0 → 0.3.2
Add Host permissions: *://*/*
Add Permissions: scripting declarativeNetRequest
Remove Permissions: *://*/* webRequest webRequestBlocking

User Reviews

User-Agent Switcher is easy to use and generally functional, with quick UA switching and site-specific control. However, its built-in UA data is outdated and maintenance is lacking, causing compatibility issues on newer Firefox versions and site errors on some services. Overall, it works for simple tasks but reliability depends on timely updates.
Pros
  • Easy to use and has a simple interface.
  • Functions as intended and allows quick switching between user agents.
  • Provides site-targeted control, letting you choose where the switch applies.
Cons
  • Built-in user-agent lists are outdated and require frequent updates, leading to site errors.
  • Not compatible with the latest Firefox versions; users report it stops working on newer browser builds.
  • Maintenance and updates are lacking, with multiple reviews calling for more frequent UA data updates.
Recent reviews
Why does it want now to "Block content on any page"?
by En*****, 2026-05-14

It's not working. I'm very disappointed.
by Pu*****, 2025-12-21

by as*****, 2025-11-24
View all user reviews ›

Is User-Agent 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.

User-Agent 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.
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.

User-Agent Switcher is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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Best User-Agent Switcher Alternatives

Here are some Firefox add-ons that are similar to User-Agent Switcher: