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

Change Opera User Agent

Bob Roberts
• Wednesday, 06 July, 2022
• 8 min read

Changing the user agent string can be useful in certain scenarios when some website's functionality is locked down to the specific platform and you need to bypass the restriction. In today's article, we will learn how to change the user agent string in the popular Opera browser.

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This allows developers to differentiate various device classes like tablets, phones, Desktop PCs and laptops, and more. The user agent string can provide web servers some details about the user's operating system, and the browser version.

Prior to version 12, the browser had its own rendering engine, Presto, which was ditched in favor of Blink. Alternatively, you can enter a custom user agent value using the text box below the list.

The list includes various versions of Internet Explorer, Edge, Opera, Safari, Firefox, and Chrome. Using the built-in Developer Tools option, you can restore the default value of the user agent in the Opera browser any time.

Scroll down your mouse to the User agent section and uncheck the Select automatically option. Select your desired user agent from the drop-down menu and reload the current page to apply the change.

Built-in ad blocker battery saver free VPN Important features are as following:a. Toolbar popup UI provides an easy interface to access 26 user -agents.


Android: a Google OS for various mobile devices including Nexus.3. Internet Explorer, Edge: two browsers build by Microsoft.

Note 1: in order to report Bugs, please visit Add-on's Homepage ( and fill the Bug report form. There are some sites which are made only for Internet Explorer or simply don’t support Opera yet and stop loading when you visit.

There are 5 options where you can choose from: 1 = Identify as Opera 2 = Identify as Firefox 3 = Identify as Internet Explorer 4 = Mask as Firefox (Opera not mentioned in user agent string) 5 = Mask as Internet Explorer (Opera not mentioned in user agent string) Enter a number from 1 to 5 (refer to the list above), and press save.

Dazito last edited by How can I change my user agent ? Rafaelluik last edited by I can enable this mode normally here by clicking the “smartphone” icon that appears in the Emulation tab.

It is designed to collect user feedbacks and bugs about this add-on. Users can suggest improvements or feature requests through this form too.

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There are 26 popular user agents to choose from! Read the privacy policy for this add-on. Please check the YouTube tutorial below to get an idea of how this add-on works in your browser. If you want to contribute to the development of this add-on, please fork it on GitHub, and push your changes to a named branch. 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.

Therefore, being able to switch between different user agent on the fly could be a big advantage when you are online. 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. Whether you use Firefox, Opera, chrome or Safari, the User agent switcher will work with your existing setup.

opera agent change user window tools developer dot within corner icon three opens right

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. 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. The other mode is the navigator user agent, which is changed within the page before it is loaded.

Is this Add-on compatible will all versions of Firefox, Opera and Chrome 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. Please note: keep these reviews clean, and avoid the usage of derogatory or inappropriate language or terminology in references to individuals or groups based on race, national or ethnic origin, color, religion, age, gender, etc.

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FunctionsetUserAgent(window, userAgent){// Works on Firefox, Chrome, Opera and IE9+if(navigator.__defineGetter__){navigator.__defineGetter__('sergeant', function(){returnuserAgent;});}else if(Object.defineProperty){Object.defineProperty(navigator,'sergeant', {get: function(){returnuserAgent;}});}// Works on Safari if(window.navigator.sergeant !== sergeant){varuserAgentProp={get: function(){returnuserAgent;}};try{Object.defineProperty(window.navigator,'sergeant', userAgentProp);}catch(e){window.navigator=Object.create(navigator, {sergeant: userAgentProp});}}} Reload to refresh your session. You signed out in another tab or window.

You know that Firefox is really a trusted web browser for Mobile bloggers and I have been using it since last few days. Anyway, Sergeant is a term which supports us to regulate the browse version and the type of browser.

Actually, it helps us to check a web page view from various browsers without installing all of them on a same machine. Currently, it supports Desktop Firefox, Android (Phone & Tablet), iPhone, iPad, Chrome, Firefox OS, Lynx and Microsoft Internet Explorer.

As I have been blogging from Firefox, I faced this kind of problem when I went to upload a picture. Feel Free to share your thoughts in the comment section below.

Don't forget to follow us on Twitter, like our Facebook Fan Page and Add us to your circles on Google+ to keep you updated with the latest technology news, gadget reviews, launches around the world and much more I have encountered some sites that claim false incompatibility with Internet Explorer 11.

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Some sites, such as YouTube and Yahoo Mail, display an annoying warning that IE is not supported and I should consider another browser, however they do work fine without any noticeable compatibility issue! 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.

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.

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