Firefox: Planets & Sun become permanently hidden in 2D View

[nstrobl]

Hovering over a planet in the legend in 3D MODE causes all but that planet to be hidden when returning to 2D MODE.

Steps to reproduce:

1. Load page in Firefox.
2. Switch to 3D MODE.
3. Hover over planet in legend.
4. Without hovering over a different planet in the legend, return to 2D MODE.
5. Note that only the hovered planet is displaying in 2D MODE.

Probably related, hovering over a second planet in the legend in 3D MODE causes all planets & sun to be hidden when returning to 2D MODE. This does not occur in Chrome.

[picturepan2]

Actually I have no idea. :(