User-Agent Switcher

User-Agent Switcher

Easily override the browser's User-Agent string

  • User-Agent Switcher
  • User-Agent Switcher
  • User-Agent Switcher
  • User-Agent Switcher
What is User-Agent Switcher?
User-Agent Switcher is a Firefox extension. Its function is to help users easily change their browser's User-Agent string. This enables users to pretend to be another browser, a feature that can be beneficial in many different circumstances. Whether requiring read access for various websites, simulating mobile or desktop browsers, or needing to use a specific browser to access a site, User-Agent Switcher provides a convenient solution. Note, this will not add features to your browser; it will simply help bypass site restrictions based on the User-Agent string.
Version: 1.4.54 (Last updated: 2024-05-14)
Creation date: 2017-05-06
Weekly download count: 2,143
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
  • storage
  • tabs
  • webNavigation
  • webRequest
  • webRequestBlocking
  • <all_urls>
Size: 4.44M
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Easily pose as another browser by changing the User-Agent header.*

Pretending to be a different browser can be useful in a number of different situations:

  • Some web pages require you to log in or buy a subscription to view their content, but give full read access to search engines.
  • Some web pages determine whether you're using a mobile or desktop browser based on your user-agent.
  • Some web pages require you to use a specific browser to access their site.
  • And potentially more…
Note that your browser will not magically morph into a different piece of software just because it's pretending to be some other software. If a web site locks you out because your browser does not support a feature they require then changing the User-Agent will not make any difference.
  • Also changes navigator.userAgent, as well generating convincing values for several of the other navigator.* properties.

Translating “User-Agent Switcher” to a new language Any help in translating this extension is greatly appreciated! To do so, simply visit our project on the WebLate hosted instance, create an account and either select an existing language or add a new one to get going. Thanks for helping out!

(Alternatively you may submit a merge request on GitLab with the updated translation files or send me the translations using the “Support E-mail”-Address.)

Getting Help Found a bug or want a new feature? Please use the GitLab issue tracker to submit these instead of just mentioning them as part of your reviews. This way it becomes much easier for me to keep track of reported issues and get back to you if additional information is needed to help you.

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User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Allows users to view websites as desktop browsers on mobile devices
  • Useful for specific tasks such as downloading files from certain websites
  • Simple and easy to use
  • Causes memory leaks for some users
  • Domain override function may not work
  • May be ineffective in bypassing certain verification processes
Most mentioned
  • Causes memory leaks
  • Ineffective in bypassing verification processes
  • Allows users to view websites as desktop browsers on mobile devices
Recent reviews

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Risk impact

User-Agent Switcher 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 if you trust the publisher.

Risk likelihood

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

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