Hmm it should be working in Firefox - as long as you're using the latest version instead of ESR it should be good; works for me on Firefox 113.0 on Linux.
Some browsers have anti-autoplay-ad protections built in that prevent audio from playing until you interact with the page. You might have to click the page or press a key on the keyboard to get it started.
Some browsers have anti-autoplay-ad protections built in that prevent audio from playing until you interact with the page. You might have to click the page or press a key on the keyboard to get it started.