Thank you for your feedback.
1. Absent “Try new version” in FF could mean that the app failed to update itself. Please, try clearing FF cache
2. Boat spinning infinitely in GE or loading stuck at 20% in Cesium is the same issue. It has to do with server and not GE/Cesium. We are still to find the cause and fix it.
3. In a sense we’ve switched to Cesium – it is loaded for new users by default.