Running a brand new 2016 MacBook Pro with Mac OS v.10.11.4 (El Capitan Edition). Installed the latest version of FireFox for Mac v.46. I got a video link emailed from a BOX user which will play video with no audio in your browser. Yet in Safari and Google Chrome it will. It will in Firefox for Windows too. But none of my Macs won't play it. Any ideas? Do I need to downgrade Firefox to make this happen? If so, to what version? The link is below. A prompt response is greatly appreciated. Thanks... https://zadv.box.com/shared/static/dmtn4t9o2qi5phl73apphxkvbupi9ym6.mov