User-Agent Switcher and Manager

Spoof websites trying to gather information about your web navigation—like your browser type and operating system—to deliver distinct content you may not want.
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User-Agent Switcher and Manager is a powerful Chrome extension designed to enhance your online privacy by spoofing your browser's user-agent string. This prevents websites from detecting your actual browser, operating system, or device, allowing you to avoid targeted content or tracking.

Key features include per-site user-agent customization, the ability to randomize user-agent strings, and the option to set user-agents per browser window. It supports a wide range of operating systems and browsers, ensuring flexible spoofing tailored to your browsing needs. The extension uses a reliable two-factor technique for accurate spoofing and operates only when active, minimizing resource use. It also allows you to exclude certain domains from spoofing for convenience. With User-Agent Switcher and Manager, gain better control over your web identity and browsing experience.

Manifest V2 Privacy & Security Productivity Developer Tools
By:
Ray
Daily users:
91,987+ 2.02K
Rating:
4.11
(737)
Version:
0.5.0 Last updated: 2023-04-26
Version code:
5554345
Creation date:
2017-09-13
Risk:
High risk impact Low risk likelihood
Permissions:
  • storage
  • <all_urls>
  • webNavigation
  • webRequest
  • webRequestBlocking
  • contextMenus
Size:
771.24K
URLs:
Website
Full description:
See detailed description
Source:
Firefox Browser Add-ons
Updated:
a day ago

Ranking

# 227 ▼ 2
Other rankings
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Other platforms

User-Agent Switcher and Manager (v0.6.4)
300,000+ 4.36 (243)
User-Agent Switcher and Manager (v0.6.4)
189,147+ 4.60 (27)

User reviews

Users appreciate the add-on's ability to switch user agents and its numerous presets, which help bypass some restrictions like downloading certain files. However, many users find the interface confusing and difficult to use. A major concern is that the extension frequently breaks Cloudflare's captcha system, causing access issues on many websites. Additionally, the add-on seems outdated with no recent updates, and users often encounter inconsistent functionality requiring manual adjustments.
Pros
  • Has many pre-populated user agent presets available.
  • Can successfully change user agent to bypass certain restrictions, such as downloading Windows .iso files on Linux.
  • Performs the basic function of switching user agents if configured correctly.
Cons
  • Frequently breaks Cloudflare's captcha verification, leading to denial of access on many sites.
  • Interface is confusing and not user-friendly; users struggle to figure out how to use whitelist/blacklist and custom modes.
  • Extension appears to be outdated and possibly abandoned, with last update over two years ago.
  • Does not consistently work out-of-the-box; users often have to manually change settings repeatedly.
  • Lacks requested features like 'Apply only this website' without using containers, limiting usability.
Recent reviews
by Valerie, 2025-05-12
It doesn't work.
by soadfan, 2025-05-07
This doesn't work. I have to manually change the user agent on every startup or time interval. I don't need a data thieving, resource wasting, pretend add-on for that. There is a "Random User-Agent (Switcher)" that works perfectly and is very simple to set up.
by Firefox user 14347746, 2025-05-03
View all user reviews ›

Extension safety

Risk impact

User-Agent Switcher and Manager requires some sensitive permissions that could impact your browser and data security. 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.
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Risk likelihood

User-Agent Switcher and Manager has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details
  • Low This extension was updated more than 6 months ago. Older versions are more likely to be stable and safe.
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Upgrade to see full risk analysis details

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