User agent - Wikipedia
https://en.wikipedia.org/wiki/User_agent
In computing, a user agent is software (a software agent) acting on behalf of a user, such as a web browser that "retrieves, renders and facilitates end-user interaction with Web content."
What's my user agent?
https://www.whatsmyua.info/
Detect user-agent, operating system, browser, and device using several libraries, including ua-parser, ua-parser-js, and platform. See what your user-agent detection library really thinks!
User-Agent - HTTP | MDN
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent
The User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, vendor, and/or version of the requesting user agent.
The User-Agents.Net website provides various user agent lists and...
https://user-agents.net/
Welcome to User-Agents.Net. Hello dear web traveler! I am very pleased for your visit and I hope that you will find here what you were looking for. This site provides various user agent lists and technical...
User-Agent Switcher for Chrome - Интернет-магазин Chrome
https://chrome.google.com/webstore/detail/user-agent-switcher-for-c/djflhoibgkdhkhhcedjiklpkjnoahfmg
Spoofs & Mimics User-Agent strings.
what is my user agent
https://whatuseragent.com/
Visited. Last user agents. curl/7.68.0.
User Agent String.Com
http://useragentstring.com/
Find lists of user agent strings from browsers, crawlers, spiders, bots, validators and others.. Claims to be a Mozilla based user agent, which is only true for Gecko browsers like Firefox and Netscape.