very slow rendering of models while both SketchUp and Firefox are open. Any hints on how to remedy the problem. As soon as I close Firefox the rendering is lightning fast. SketchUp8 ran great while Firefox was open. Problem began with SketchUp2015.
SketchUp15, version 15.3.331 64-bit
Nvidia GeForce GT 620 (with current drivers)
Windows 7 pro (up-to-date)