Comment 3 for bug 281348

But every time firefox crashes it loses all the extra icons and sometimes even the default extra icons, so when the customize toolbar windows comes up, it is almost empty or totally empty.
Using the "Repair Extensions/Themes List" in the firefox help menu, will get the icons back to the customize toolbar windows, but the icons positions on the toolbars are also reset, meaning that most of them would have to be brought out of the customize windows again.