How to change user agent using Firefox4 August 2021 in FireFox tagged firefox / responsive / user agent by Tux A video demonstrating how to change the user agent of your Firefox browser. Share this:Share Click to email a link to a friend (Opens in new window) Email Click to print (Opens in new window) Print Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X This post is also available in: Greek