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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한국인Overview
Features & Capabilities
User Growth & Download Statistics
- By:
- Ray
- Daily users:
- 82,651 -664
- Rating:
- 4.05 (787)
- Version:
- 0.6.8 Last updated: 2026-08-10
- Version code:
- 6404549
- Creation date:
- 2017-09-13
- Risk:
- Moderate risk impact Very low risk likelihood
- Permissions:
- storage
- contextMenus
- scripting
- declarativeNetRequestWithHostAccess
- webRequest
- storage
- Host permissions:
- <all_urls>
- <all_urls>
- Size:
- 865.79KB
- URLs:
- Website
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-08-16
- Compare stats and ranking:
- User-Agent Switcher and Manager vs User-Agent Switcher and Manager
- User-Agent Switcher and Manager vs User Agent Switcher – Change & Manage
- User-Agent Switcher and Manager vs User-Agent Switcher PRO
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Permission Change History
2026-04-24: Version 0.6.6 → 0.6.7
Add Permissions: webRequest
2025-05-27: Version 0.5.0 → 0.6.5.1
Add Host permissions: <all_urls>
Add Permissions: scripting declarativeNetRequestWithHostAccess
Remove Permissions: <all_urls> webNavigation webRequest webRequestBlocking
Remove Optional permissions: cookies
User Reviews
User reviews for the Firefox add-on show a split experience. A few users found it very useful and rated it among the best UA switchers, especially when it worked and could outperform alternatives on some sites. However, the majority report reliability problems: the extension frequently stops functioning across updates and Firefox versions, and it can break YouTube playback and Google searches, sometimes prompting captchas. Compatibility issues are common, including broken whitelist/containers features and failures on newer Firefox forks. Overall, while it can be helpful in narrow use cases, its reliability and ongoing support are major concerns. Pros
- When it worked, it was very useful and praised as one of the best UA switchers.
- It performed well compared to other UA switchers and could fool some sites.
- It still had value in scenarios that don't require up-to-date user agents.
Cons
- Frequently stops working or becomes non-functional across updates and Firefox versions.
- Breaks YouTube playback after a short time, causing the player to stop or crash.
- Disrupts Google search and can trigger captchas.
- Compatibility issues: broken whitelist/containers features, failures on newer Firefox forks, and removal of per-container UA assignment.
- Poor reliability on Android and in general.
Recent reviews
After installing the extension, a feature introduction page appears.
Clicking "Click here to continue," which occupies most of the screen, displays a fake Microsoft-style support screen prompting you to make a phone call.
This is a phishing scam page.
by oc*****, 2026-08-11
by Fi*****, 2026-08-09
Is User-Agent Switcher and Manager 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 and Manager 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.
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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 and Manager has earned a good reputation and can be trusted.
Risk likelihood analysis details
- High This extension was recently updated in the past month. New updates may not be stable or safe.
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