

Claims to be a Mozilla based user agent, which is only true for Gecko browsers like Firefox and Netscape. See Configuration Editor for Firefox for more information about using the about:config page to reset or delete preferences.Copy/paste any user agent string in this field and click 'Analyze' productName – where productName can be the name of some third party software (e.g.


Check the "Compatibility" tab and make sure that the compatibility mode option is not selected. You can open the Properties of the Firefox desktop shortcut from the right-click context menu. Note: If your user agent shows a previous Windows version, such as Windows NT 6.1 (Windows 7) instead of Windows NT 10.0 (Windows 10), make sure you are not running Firefox in Compatibility mode. For example, the default user agent entry for Firefox 83 on Windows 10 (64-bit) would appear as: The Application Basics section will show your current Firefox version and will include a User Agent entry. This will open a page with the address about:support. To view your user agent, click the Firefox menu button, click Help Help and select Troubleshooting Information More Troubleshooting Information. It's important to switch Firefox back to the default user agent so that websites work properly. Websites may not display correctly or may show a message that your browser is outdated or incompatible, based on the detected user agent.

Sometimes, add-ons and other installations can change your user agent without your knowledge. Web developers might do this to see how their websites will appear on different systems and browsers. You can change Firefox's user agent to trick websites into thinking that you're using a different browser or operating system.
