Jan 15, 2016 User Agent Switcher for Chrome. Chrome beta) and I need to switch user agent only on one of. CSS, JavaScript or XML files from Web. Aug 25, 2017 download xml user agent list 2.x. UserAgent Switcher is made by Chris Pederick, who also makes the absolutely indispensible Web Developer Toolbar. While being an excellent tool, the User Agent Switcher only comes with a few user agents. Now you have a complete, over complete really, list of useragents, and can add as many.