@cbars -- Re: It's the microphone, not the browser
Either allow the browser, or install a multitude of apps based on customer whims.
Weak.
Assuming you're in a position to need a half-dozen different web conferencing services to be available at a moment's notice on your phone (or even your laptop -- highly likely, that), you enable the mic for the browser at that time, and disable it afterward. Shirley, you could be arsed to do that small amount of setup before your oh-so-important next web conference.
If you can't be arsed, then how did you get to be so important?