UserAgent Switch Firefox

UserAgent Switch

Switch browser User-Agent to simulate different devices and browsers in a million-level database

Features & Capabilities

USER AGENT SWITCH is a powerful browser extension that allows you to easily simulate user agent information from various devices and platforms. Based on the million-level user agent database provided by useragents.io, this extension offers a convenient browser identity simulation solution for developers, testers, and regular users.

Unlike other user agent switchers, it allows you to set your frequently used U/As in the side panel. You can also open the useragent.io website, where you can choose from millions of U/As. They are scientifically categorized so you can quickly find the U/A you need.

☑️ Core Features 1️⃣ Massive user agent library: Based on the million-level user agent database from useragents.io 2️⃣ Simple setup: Intuitive interface with no complicated configurations required 3️⃣ Multi-device simulation: Supports simulating various browsers, operating systems, mobile devices, and desktop platforms 4️⃣ Quick filtering: Convenient filtering function to help you quickly find the desired user agent

☑️ Usage Instructions 1️⃣ Click the extension icon in the browser toolbar to open the user agent list page 2️⃣ Use the filtering function to find the user agent you need 3️⃣ Move your mouse over the target user agent and click the "Switch to this U/A" button 4️⃣ Open a new page or refresh the current page for the settings to take effect

☑️ Application Scenarios 🟠 Website compatibility testing: Check how websites display on different browsers and devices 🟠 Developer debugging: Simulate different environments for front-end development and debugging 🟠 Bypassing restrictions: Get around some website access restrictions based on user agents 🟠 Privacy protection: Enhance browsing privacy by changing user agents

⚠️ Notes Some websites may detect browser environments through other methods, so changing the user agent alone may not fully simulate the target device After switching user agents, you need to open a new page or refresh existing pages for the changes to take effect It is recommended to switch back to the default user agent after testing to ensure a normal browsing experience

User Growth & Download Statistics

Manifest V3 Add-on
By:
Amorichy
Daily users:
11
Rating:
5.00
(1)
Version:
1.4 Last updated: 2025-10-23
Version code:
6059856
Creation date:
2025-09-08
Risk:
Moderate risk impact Moderate risk likelihood
Permissions:
Host permissions:
  • <all_urls>
Content scripts matches:
  • *
  • useragents.io
Size:
227.87KB
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-18
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Amorichy
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/useragentswitch/

Is UserAgent Switch 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.

UserAgent Switch 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.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Low ******* ****** ** *** ********* ******** *************
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.

UserAgent Switch is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* *********** ** ***** ******** ********************************* ***** ****** ****
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
Extension Guard
Extension Guard

Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard

Secure Your Browser
Upgrade to see full risk analysis details

Best UserAgent Switch Alternatives

Here are some Firefox add-ons that are similar to UserAgent Switch: