Hi,
We created a simplified web service (1 geodatabase) in ArcServer. We then created a ArcGIS.online project with the topo basemap that referenced this service. When opening in Firefox we are unable to access the the layer (see attachment). When opening in ArcGIS or Arc Explorer, no problem. When opening in IE 8 or IE9, no problem. Any ideas on why this would occur? My first guess is the browser security settings, but I can't find anything unusual with the settings.
Thanks