title: Is there a command line flag to unblock autoplay of video in firefox?
body: <p>I am trying to run a firefox instance with the help of Xvfb-run and play video in a tab. The video is set to autoplay on load, but firefox(>=66) has the default set to block audio and video. I want to set that flag to false, this could be done using the GUI (<a href="https://support.mozilla.org/en-US/kb/block-autoplay" rel="nofollow noreferrer">link</a>) but I want to somehow do it using the CLI itself. Is there a way? </p>