We recommend Chrome or Firefox for optimal quality of your online meetings. Why? Both browsers provide excellent support for WebRTC in real time. Safari, IE, and Edge will work similarly, but Firefox and Chrome carry better audio at lower bit rates. System webmeetig needs 80/443 open TCP / IP ports for proper operation (For HTTP / HTTPS) and UDP ports in the range of 16384 – 32768 (for FreeSWITCH / HTML5 RTP transmissions) in the participant’s network / computer outwards