When using voice.google.com in Firefox the recipient can't hear me at all. This problem is intermittent. After I've restarted my Mac, things seem to work fine for a while. Then, after a while, the recipient can't hear me when I make a call. I've given Firefox permission for google to use the internal microphone. The mic symbol flashes red. Another issue: the flashing red mic keeps flashing even after the phone call is ended. I've tried clearing out cookies/cache, closing/reopening the page, closing/reopening the browser. I've tried google voice in Chrome. I was not mute in that call. Thanks for any help.