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:
89,967+ -81
Rating:
4.11
(737) 1 new ratings
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

# 225 ▼ 1
Other rankings
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Other platforms

User-Agent Switcher and Manager (v0.6.4)
300,000+ 4.36 (242)
User-Agent Switcher and Manager (v0.6.4)
197,835+ 4.60 (27)

User reviews

The add-on offers many user agent presets and helps access content restricted by browser detection, like Windows ISOs on Linux. However, multiple users report it breaks Cloudflare captcha systems and causes site access problems. Its interface is confusing, lacks automation, and the tool appears unsupported after years without updates. Users find whitelist/blacklist features unclear and complain about needing manual user agent changes on every startup or interval.
Pros
  • Provides many pre-populated user agent presets.
  • Allows changing user agent strings to access blocked content.
  • Can be useful for tasks like downloading Windows ISO files on Linux.
  • Apparently capable of switching user agents effectively when properly configured.
Cons
  • Breaks Cloudflare's captcha verification system, causing access issues on many sites.
  • Confusing and unintuitive user interface, making it difficult to use.
  • Requires manual changing of user agent frequently, lacks automatic or persistent settings.
  • Lack of recent updates; appears abandoned or unsupported.
  • Whitelist and blacklist modes are confusing and not user-friendly.
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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