Kinda works...It will preload a video on youtube...I use firefox with win 10 desktop..problem is if you open a youtube video in new tab the extension is disabled....you need to physically enable extension button in order for the extension to engage/turn on...by this time the youtube player has already started..then once thats done and the extension takes over the audio keeps playing even when you pause video...could have been what I needed...will keep looking for another way to force buffer.