User-Agent Switcher PRO

User-Agent Switcher PRO

Anonymize your browsing by easily switch/spoof/fake User-Agent with what you want. User-Agent selection mode: Manual, Auto, Random

What is User-Agent Switcher PRO?
User-Agent Switcher PRO is an extension for Firefox that enables you to easily switch and spoof User-Agent. It is useful for developers to test the site-view quickly and for users who desire enhanced privacy while browsing. The add-on also intercepts iframes and client-side javascript.
By: Matt Glow
Users: 160 ▼ -2
Rating: 4.00 (2)
Version: 1.0.2 (Last updated: 2023-02-15)
Creation date: 2023-02-11
Weekly download count: 230
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
  • storage
  • alarms
  • webRequest
  • webRequestBlocking
  • <all_urls>
Size: 109.70K
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Chrome-Stats extension

Extension that allows user to easily switch the User Agent. Useful for developer to test the site-view by quickly switching between desktop and mobile versions. Useful for users who want more privacy while browsing. Unlike other similar extensions this one also intercepts iframes and client-side javascript.


  • selection of the preferred User-Agent from a list
  • User-Agent customization
  • User-Agent auto-switch every N requests or minutes
  • User-Agent auto-switch following the "device OS type" rule (to see more, once installed, click on the blue question mark in the popup)
  • to use the extension while browsing incognito, remember to enable the tick during installation!
User reviews
112723 It's not able to spoof [aggressive] iframe navigator.userAgent
by clockcycle, 2023-11-27
View all user reviews
Risk impact

User-Agent Switcher PRO is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install User-Agent Switcher PRO if you trust the publisher.

Risk likelihood

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

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