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    User-Agent header

    In computing, the User-Agent header is an HTTP header intended to identify the user agent responsible for making a given HTTP request. Whereas the character sequence User-Agent comprises the name of the header itself, the header value that a given user agent uses to identify itself is colloquially known as its user agent string. The user agent for the operator of a computer used to access the Web has encoded within the rules that govern its behavior the knowledge of how to negotiate its half of a request-response transaction; the user agent thus plays the role of the client in a client–server system. Often considered useful in networks is the ability to identify and distinguish the software facilitating a network session. For this reason, the User-Agent HTTP header exists to identify the client software to the responding server.

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    https://developer.mozilla.org › en-US › docs › Glossary › User_agent

    User agent - Glossary - MDN Web Docs

    Jul 11, 2025 ... 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 ...

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    https://chromewebstore.google.com › detail › user-agent-switcher-for-c › djflhoibgkdhkhhcedjiklpkjnoahfmg

    User-Agent Switcher for Chrome - Chrome Web Store

    Sick of some archaic site blocking you because you're not using Netscape 4? The User-Agent Switcher for Chrome is the answer. With this extension, you can ...

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    https://www.whatismybrowser.com › detect › what-is-my-user-agent

    What is my user agent? - WhatIsMyBrowser.com

    Jun 25, 2024 ... Your User Agent is: ... The weird looking string of text (above) is your user agent. It's a short, technical description of the web browser, ...

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    https://developer.mozilla.org › en-US › docs › Web › HTTP › Reference › Headers › User-Agent

    User-Agent header - HTTP - MDN Web Docs - Mozilla

    Oct 28, 2025 ... The HTTP User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, ...

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    https://random-user-agent.com

    Random User-Agent and Switcher (browser extension)

    This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.

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    https://chromewebstore.google.com › detail › user-agent-switcher-and-m › bhchdcejhohfmigjafbampogmaanbfkg

    User-Agent Switcher and Manager - Chrome Web Store

    Details · Version. 0.7.1 · Updated. September 1, 2026 · Flag concern · Offered by. rynu.smith · Size. 821KiB · Languages. 3 languages. English, русский, 中文( ...

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    https://www.youtube.com › watch

    What a User Agent Actually Does in 2026 - YouTube

    Jul 1, 2026 ... When a scraper gets blocked, changing the user agent is the first thing most people try. Years ago that was real stealth advice.

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    https://www.howtogeek.com › 114937 › htg-explains-whats-a-browser-user-agent

    What Is a Browser's User Agent? - How-To Geek

    Sep 28, 2016 ... The contents of the user agent field vary from browser to browser. Each browser has its own, distinctive user agent. Essentially, a user agent ...

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    https://useragents.io

    UserAgents.io: List of User Agents strings

    UserAgents.io provides a simple way to parse a user agent and get technical information about it. The database is updated daily and easy to navigate. What ...

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    https://en.wikipedia.org › wiki › User_agent

    User agent - Wikipedia

    On the Web, a user agent is a software agent responsible for retrieving and facilitating end-user interaction with Web content. ... This includes all web browsers ...

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    https://toolbox.googleapps.com › apps › useragent

    Useragent - ToolBox Google Apps

    Google Admin Toolbox Useragent ; Mozilla Compatibility, Mozilla 5.0 ; Platform, Linux; Android 6.0.1; Nexus 5X Build/MMB29P ; Layout Engine, AppleWebKit 537.36 ...

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    https://whatmyuseragent.com

    What Is My User Agent?

    A browser's user agent string (UA) helps identify which browser is being used, what version, and on which operating system. When feature detection APIs are not ...

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    https://www.w3.org › WAI › UA › work › wiki › Definition_of_User_Agent

    Definition of User Agent - WAI UA Wiki - W3C

    Jun 16, 2011 ... A user agent is any software that retrieves and presents Web content for end users or is implemented using Web technologies. User agents include ...

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    https://www.reddit.com › r › firefox › comments › 1729yqx › what_does_useragent_really_do

    What does user-agent really do? : r/firefox - Reddit

    Oct 7, 2023 ... It's historically used as a signal to which browser you're using or what bot you are. Some sites (looking at you Google) use it or some other ...

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    https://vivaldi.com › blog › user-agent-changes

    User Agent Changes | Vivaldi Browser

    Dec 10, 2019 ... A browser's User Agent is a line of text that is sent from the browser to the website when it connects, telling the site which platform ( ...

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    https://stackoverflow.com › questions › 2601372 › what-is-the-standard-format-for-a-browsers-user-agent-string

    What is the standard format for a browser's User-Agent string?

    Apr 8, 2010 ... authentication; go; symfony; t-sql; matplotlib; opencv .htaccess; google-chrome; for-loop; datetime; codeigniter; perl; http; validation

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    https://dnschecker.org › user-agent-info.php

    What is My User Agent? - DNS Checker

    The user agent checker displays the string text your web browser sends in the "User-Agent" header in the HTTP requests. The user agent Information identifies ...

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    https://github.com › browser-use › browser-use

    Agents that use the browser. - GitHub

    Browser Use is the open-source browser agent (Python and TypeScript), a $0.02 per browser-hour cloud browser with stealth, CAPTCHA solving and residential ...

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    https://webaim.org › blog › user-agent-string-history

    History of the browser user-agent string - WebAIM

    Sep 3, 2008 ... History of the browser user-agent string ... In the beginning there was NCSA Mosaic, and Mosaic called itself NCSA_Mosaic/2.0 (Windows 3.1), and ...

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    https://chromewebstore.google.com › detail › random-user-agent-switche › einpaelgookohagofgnnkcfjbkkgepnp

    Random User-Agent (Switcher) - Chrome Web Store

    Details · Languages. 13 languages. Deutsch, English, Indonesia, Tiếng Việt, Türkçe, español, français, polski, português (Brasil), русский, українська, 中文( ...

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