Not working in Firefox

I use this plugin. It work well on chrome browser. But I try to view the page by Firefox. The video is not mute.

My webpage:http://www.saltstudio.net/food-drinks-photography/

Code: https://youtu.be/pIXh49uJi9A?autoplay=1&mute=1

• This topic was modified 9 years, 6 months ago by calvinsalt.