Run Synthetic with --use-fake-ui-for-media-stream

Synthetics question template

I have a test that needs to open a webpage that requires the browser to have permission to access the camera.
This is done in Selenium with --use-fake-ui-for-media-stream. See below. Is there a way to add this flag in a Synthetic script?

As in
https://testingbot.com/support/selenium/permission-popups#:~:text=function(){ %20%20%20%20%20%20%20%20driver.quit()%3B %20%20%20%20%20%20})%3B%0A%20%20%7D)%3B-,Camera%20and%20Microphone%20Permissions,-During%20your%20Automated

Hi, @paul.kohlhoff: Unfortunately, it is not possible. By the time your script starts running, the browser instance has already been created; you cannot modify that process.