In Firefox on a Mac Laptop Audio Doesn't Play

In Firefox on a Mac Laptop Audio Doesn’t Play. I was going through WHO IS SHE and the audio doesn’t play.
Works fine on a PC using Google Chrome browser.

@Newbie77 - Would you try other lessons to see if the audio doesn’t play for all lessons or just for WHO IS SHE. Does the text to speech work fine in this lesson?
Also, try to refresh the page pressins Ctrl + F5 to see if that helps.

It doesn’t work for “Le Footing” also. It doesn’t seem to be a refreshing problem.

@Newbie77 - Would you try any other browsers on your Mac laptop? It may be an issue with Flash.
By the way, what version of Firefox are you using on your Mac?