Started up Firefox this morning and was prompted for some updates and settings changes. Decided to skip those as there was something i wanted to do. Now I have no sound in Firefox, on any site. tested local files in VLC player and i have sound. even uninstalled and reinstalled my sound device. still no sound in Firefox. i do have sound in chrome. so it is a firefox issue. and 2 reboots have not resolved it. need to know what to check next ? please and thank you.