While I cannot speak for 100% of my attendees, I can say that I had to troubleshoot for numerous callers who could not get anything but Chrome to work including one presenter! Has anyone else had similar issues with other browsers? Is there a report that tells how attendees joined (desktop vs mobile, browser used, geographic location, etc)? I have an example from our podcast host - Buzzsprout if anyone is interested.
I have added language on the confirmation emails that indicates Chrome as the best browser for live webcasts.