my Cesium application (newbie alert: the first one;-)) runs perfectly in the Google Chrome browser; I did not have to do anything about data sources (no need, as I want to use just the viewer's default collection, i.e. Bing, ESRI, OSM, etc.). The OS is Windows 7.
However, when I try to run in Firefox (current version, 37.0.2), I am getting an error message in the widget:
"An error occurred while rendering. Rendering has stopped.
TypeError: this._dataSourceDisplay is undefined."
(Follows the call stack, unfortunately not copy-pastable; last line refers to Cesium.js:148637:25, the widget.render() call).
It is not Firefox per se: HelloWorld and the Sandcastle demos do run fine.
But I have no idea what my application may be missing which is not necessary for Chrome, but vital for Firefox.
In what direction should I be looking?
(If at all possible, I'd like to continue to avoid explicit messing about with data sources.)
Thanks in advance for all tips.