What Does Your User Agent Say About You?


A user agent is a computer program representing a person, for example, a browser in a Web context.

Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string. This string often identifies the browser, its version number, and its host operating system.

Spam bots, download managers, and some browsers often send a fake UA string to announce themselves as a different client. This is known as user agent spoofing.

The user agent string can be accessed with JavaScript on the client side using the navigator.userAgent property.

A typical user agent string looks like this: "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0".


User Agent String

Browser Data

User Agent Switcher Internet Explorer 11

Danielle Fletcher
• Monday, 05 October, 2020
• 10 min read

Thanks to the new flags page in InternetExplorer11, it is now very easy to change the user agent string. You can experiment with it using the latest publicly available Windows 10 build at this moment, which is 9879.

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Additionally, you can set the Sergeant text box back to By Sergey Lukashenko on January 2, 2015, last updated on March 22, 2018, in InternetExplorer.

Sergey Lukashenko is a software developer from Russia who started Winner back in 2011. On this blog, Sergey is writing about everything connected to Microsoft, Windows and popular software.

Other sites, such as Vodafone Greece, are even worse by denying to load at all unless I open them in another browser such as Firefox. I want to use Internet Explorer 11 instead, so I tried to open the Developer settings and change the user agent in Firefox or Chrome, but apparently I did not do that correctly, all the affected sites still detect I run IE 11.

Have you tried using the string below -other examples are shown on the following page (you can even try the Linux version) Mozilla/5.0 (Windows NT 10.0; WOW64; RV:54.0) Gecko/20100101 Firefox/73.0 Other sites, such as Vodafone Greece, are even worse by denying to load at all unless I open them in another browser such as Firefox.

I want to use Internet Explorer 11 instead, so I tried to open the Developer settings and change the user agent in Firefox or Chrome, but apparently I did not do that correctly, all the affected sites still detect I run IE 11. User agent changes successfully but cannot trick Vodafone or YouTube.


If you ever wanted to make your web traffic seem like it was coming from a different browser–say, to trick a site that claims it’s incompatible with yours–you can. This allows you to request web pages intended for different browsers–or even different devices, like smartphones and tablets.

Click the menu button to the right of the “Console” tab at the bottom of the Developer Tools pane and select “Network Conditions” If you don’t see the console at the bottom, click the menu button in the top right corner of the Developer Tools pane–that’s the button just to the left of the “x”–and select “Show Console”.

On the Network conditions tab, uncheck “Select automatically” next to User agent. It only works while you have the Developer Tools pane open, and it only applies to the current tab.

To create the preference, right-click on the about:config page, point to New, and select String. You can find extensive lists of user agents on various websites, such as this one.

This setting applies to every open tab and persists until you change it, even if you close and reopen Firefox. To revert Firefox to the default user agent, right-click the “general.user agent.override” preference and select Reset.

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Microsoft Edge and InternetExplorer have user agent switchers in their developer tools, and they’re nearly identical. To open them, click the settings menu and select “F12 Developer Tools” or just press F12 on your keyboard.

The developer tools will open in a separate pane at the bottom of the window. It only applies to the current tab, and only while the F12 Developer Tools pane is open.

Chris has written for The New York Times, been interviewed as a technology expert on TV stations like Miami's NBC 6, and had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read more than 500 million times---and that's just here at How-To Geek.

The main advantage is that you will be able to visit pages that only allow access with InternetExplorer, something that continues to happen even today. If you need to be using a specific browser to correctly see a page, but don't want to give up on Firefox, UserAgentSwitcher is the solution you've been looking for.

Next is FAQ, this section is useful to get information about how this add-on works in your browser. It is designed to collect user feedbacks and bugs about this add-on.

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Users can suggest improvements or feature requests through this form too. The last section is dedicated to reports submitted through the GitHub website.

Toolbar popup UI provides an easy interface to access all 26 user agents. Clicking on any UA, will change your browsers user agent immediately.

Second row is for desktop user agents which includes Google Chrome, Opera, Firefox, Safari, MS Internet Explorer and the new Edge browser by Microsoft. The last row in the popup UI is dedicated for the control options including a button to change the UA to its default value.

Moreover, some websites make look better in mobile devises while you are surfing in a desktop browser. With user agent switcher you have access to display a webpage or web element from a variety of different systems.

The process for changing user -agents on-the-fly after the extension is installed in your browser is an extremely simple task. In other words, user agent switcher can quickly switch between iOS, android, and other famous mobile devices.


We do NOT host any extensions/add-ons/plugins in our website, all the download links will direct you to the related Firefox, Google Chrome, Opera and Safari Add-on Stores. Simply open the toolbar-popup and click on the desired user agent, selected UA is marked with green border.

Windows Phone, which is a mobile OS from Microsoft for its windows-phone devices. This user agent is available in 4 different operating systems (windows, Linux, mac and chromes).

This user agent is available in 3 different operating systems (windows, Linux, mac). This user agent is available in 5 different operating systems (windows, Linux, mac, chromes, IBM Warp OS/2).

This user agent is available in 3 different operating systems (windows, Linux, mac). To see your browsers user agent, you can use many websites that offer this service for Free.

But, if you do not want to completely remove this Add-on, you can simply open the toolbar popup, and click on the “Switch to Default” button in the bottom left corner. This way, your browsers user agent will be switched to its default value and no actions or changes will be made by this Add-on.

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Once the UA is changed, click on the edit button in the bottom right corner in the popup. When you see the edit window opened, make your desired changes and click on the OK button.

Please note, before editing any user agent make sure the new value is a valid UA, otherwise the Add-on will not be able to change your browsers user agent and end up seeing errors in websites that you visit. If you want the selected user agent to be active on a specific website only, please open the toolbar-panel UI and enter the website address in designated field (input area in the bottom middle section).

In other words, if you do not modify the URL field, the UA will be applied to all websites and domains. In order to change the UA, the Add-on works in two separate modes.

Yes, it is fully compatible with all versions of modern browsers including, Firefox, Chrome and Opera. Please note, you can edit/update any of these strings from the toolbar popup UI once you run the Add-on in your browsers.

Over the past few years, mainstream browsers have all started including such functionality as a part of their developer console or within standard menus. Although uncommon, there is a chance for browser extensions to become hijacked for malicious purposes, which could be a risk to your security.

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If you look or scroll down towards the bottom of this panel, you should see a User agent label, which includes a respective set of options. Here, you can select from a set of defined user agents or even enter your own custom user agent string.

The first step is to type about:config in the address bar and hit Enter. If it’s your first time doing so, you should see a disclaimer stating that you’re entering risky territory that’s for advanced users only.

Craig is a long-time writer, coder, and marketer with years of experience in the technology and gaming spaces. Since 2008, he's worked remotely with some of the most notable publications in these industries, specializing in Windows, PC hardware and software, automation, and the like.

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