I find that if I right click a link in FF, the pop out menu will got a black background screen. If I move the pointer to the black area, then the selected item will become clear back to normal. It looks like a re-freshing problem to me, but I don't know how to solve it.
It has no problem in my ie and Chrome, only in FF. So I don't think it is my display card problem, most likely is FF's setting. I have no idea where in FF to set it right.
Please help. Many thanks to your reply.
(I'd like to post a jpg and show you what exactly it looks like, but I find no function to do it in the forum's edit tool menu.)