When i try to select the virtual background option, it runs the performance test screen and end of the test, it showed system did not meet expected requirement. instead, you can run the performance test in the background when the application loads parallely and intimiate user with a small icon above saying virtual background feature cannot be used. it saves lot of time. also suggest text like "try closing other tabs for best experience" for this feature, which worked for me. so user dont need to open the link and read through documentation, which hardly users does.