The commands are announced at the end of the announcement.  Listen for such commands when you get messages like that in browsers.  I believe that in firefox, ivf you use f6, you may have to repeat it more than once, you will get to the announcement and you can hear it again.  I think you can execute the commands in the main window, or in the part of the window you are in when you get there with f6.

 

You can continue to use f6 to get back to the main part of the window.

Gene