For which version?
I can confirm when using V14 with Edge, that a number of the screens have a different appearance than what other browsers will show. When I look at the Services with Edge, it shows the status first and then the service name. When looking at the same with others, to include IE11, they show service name first and then the status.
I think that 3CX prefers a compliant browser such as Chrome as this is also supportive of WebRTC.