Audio doesn't work unless we have video enabled.

We have the problem that when the video is disabled, the audio isnt working. It's only happening on roll20, the mic works perfectly everywhere else. The problem only started when firefox updated and I'm not sure how to fix it. I did all the recommended bug fixes etc. but nothing worked. 

Hi Gina, Please carefully work through to the first three steps of our guide to Solving Technical Issues: Step 1: Make sure to use the right browser             - Please check if these issues persist when using both Chrome and Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20             - Please disable all add-ons/extensions. Step 3: Clear your cache If these are the troubleshooting steps you have already followed, please provide us with the information listed in step 4.