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User Agent Spoofing

When a browser or bot requests a webpage, it sends a User-Agent HTTP header containing a string of text that describes the client. So, if you are using Firefox on Windows to browse the web, it is sending this string of text to every website you visit, where it is visible by the server and any embedded third-party scripts like banner advertising:

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:142.0) Gecko/20100101 Firefox/142.0

Example Strings

If you need valid user agent strings to use in your spoofing adventures, consider some of these resources:

WhatIsMyBrowser.com has a pretty comprehensive set of pages covering a wide variety of user agents.

Application Specific Instructions

How to spoof your user agent depends on the type of software you are using:

Web Browsers

Firefox

Brave

Chrome

Safari

Edge

Terminal Utilities

cURL

Newsboat

wget

Tutorials, Security

User Tools

Site Tools

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