I installed SparkyLinux 4.5.2 i686-lxde last week, and although most things are OK, Firefox is behaving oddly. Whenever I try to scroll a window using either the mouse wheel or clicking in the vertical scroll bar on the right of the window, it responds very slowly. With the mouse wheel, it appears to be storing up the mouse events and reacting to them, in a jerky way, about once per second. More or less the same thing happens with clicks in the vertical scroll bar.
Any thoughts on how I could investigate this further?
Thanks
PeterP