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

Custom User Agent String Internet Explorer

Maria Garcia
• Tuesday, 05 July, 2022
• 7 min read

You can experiment with it using the latest publicly available Windows 10 build at this moment, which is 9879. To change the UserAgentstring in InternetExplorer 11, you need to open the Flags page mentioned above.

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Type the text below in the IE address bar and press Enter on the keyboard: Now InternetExplorer 11 tells websites that it is Firefox running on Linux.

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.

This policy setting allows you to customize the InternetExplorer version string as reported webbing servers in the HTTP Sergeant header. If you enable this policy setting, InternetExplorer sends the specified custom string in the version portion of the Sergeant header.

When you load a web page such as, a list of checks are performed to determine the platform (macOS, Windows, Linux), web browser (Microsoft Edge, Chrome or Safari for iOS) and the system type (x86 PC, Galaxy Tab, iPhone/iPad). You likely see the difference when you load our website in Microsoft Edge on a Windows 10 PC vs Chrome on an Android smartphone.

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A feature of web browsers called the useragentstring makes this happen. Both Edge and InternetExplorer support a variety of modes, including Opera, Safari, Firefox, and Chrome.

When selected, the page you are browsing will be refreshed in real time, letting you see how it behaves in that particular web browser. In Chrome, you can open the Developer tools quickly by pressing Control + Shift + i.

Click in the Custom list box then choose the desired browser mode. Opera’s Developer Tools are based on Chrome, but accessing it is a bit easier.

Unlike Chrome, Opera, Edge, and IE, Firefox doesn’t have a user -friendly way to quickly switch the useragentstring. If editing the configuration by hand makes you leery, I recommend you use a quick and easy add-on.

Choose the desktop web browser and operating system platform to view the desired website. But modifying the useragentstring will let you download the ISO image directly if the page detects another platform such as Linux or macOS.

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What are the sample user agent strings available in the Add-ons options page? There are more than 100 predefined user agent strings available to choose in the Add-on options page.

This list covers all modern browsers including Google Chrome, Mozilla Firefox, Opera, Safari, Marathon, as well as Mozilla Thunderbird browser and many more. Also, all the user agents are provided for both desktop and mobile platforms.

Each UA can also be modified from add-ons options page to match your specific need. Custom Sergeant String (abbreviated as Cuts) is a browser add-on (extension) that enables you to quickly change the user agent (UA) of your browser to your desired value.

In order to find an user agent, as mentioned above, you can use the predefined UA table and choose a string from there. There are more than 100 UAS available in the table for almost all modern browsers and ranging from desktop to mobile platforms.

There are plenty of websites to offer free user agent string lists. Modify the useragentstring sent by InternetExplorer by editing the Windows registry.

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Since this tweak involves editing the Windows registry it is strongly recommended that a backup is made before making changes. Go to File menu export, navigate to a location, give filename and click.

Navigate to the following location HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ Internet Settings\5.0\ Sergeant \Post Platform Right-click on the right pane and create a new String Value. If you want to remove certain values which have been added to the useragentstring by the software you installed navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ Internet Settings\ Sergeant \Post Platform This location might not always exist but if its there you can go there to find some String Values.

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” On the Network conditions tab, uncheck “Select automatically” next to User agent.

You can then select an user agent from the list or copy and paste a customuseragent into the box. It only works while you have the Developer Tools pane open, and it only applies to the current tab.

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To create the preference, right-click on the about:config page, point to New, and select String. 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. 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. Click the “Emulation” tab and choose an user agent from the Useragentstring box.

You can also select the Custom option in the Useragentstring list and type a customuseragent into the box. If the user agent you want to use isn’t shown here, select “Other” and you can provide a customuseragent.

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.

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I couldn't find Safari 13 specific IE useragentstring either. If Apple don't provide one, it is going to be tough to get IE useragentstring working.

Do you have clone backup with previous version of Safari installed? There was a IE extension that used to be free on chrome as well and now they want to charge u for it.

I usually use the developer tab but my computer auto updated itself to 13.0.3 and not IE is gone ... There has not been an InternetExplorer version for Mac in 16 years.

There is no userAgentString that would Identify a current InternetExplorer version on a Mac. If you just want to trick the website into thinking you are using InternetExplorer, then any current version of InternetExplorer you would be using would have to be on Windows, so those strings should work.

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