Power Automate Classic UI is a Chrome extension developed by WyattDave. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This free extension automatically adds '?v3=false' to Power Automate, effectively stopping the new UI from being enabled.

With Power Automate Classic UI, users can prevent the new Power Automate UI from being turned on. It is important to note that once this extension is enabled, the new UI cannot be overridden. To view the new UI, the extension will need to be turned off.

Overall, Power Automate Classic UI is a useful tool for those who prefer to stick with the classic user interface in Power Automate. It offers a simple and straightforward solution to prevent the new UI from being displayed.