IE11 is fully supported by CenarioVR. When using IE, you do need to make sure it is in IE11 mode though. Internet Explorer can be set to “compatibility mode” which makes it emulate IE5-IE10, all of which would be unsupported.
I’ve tested a number of scenarios in IE11 to make sure, it seems to work well. Is there something particular you are seeing?
All other major browsers are supported as well, Chrome, Firefox, Edge, and Safari