I have a Sony Vaio Z13 and it happens with the intel card and the nvidia card. I found this:
https://wiki.archlinux.org/index.php/Compiz_Troubleshooting#Context_menu_in_applications_.28firefox.2C_....3F.29_disappears_on_mouseover
But it doen't helped for me.
I have a Sony Vaio Z13 and it happens with the intel card and the nvidia card. I found this:
https:/ /wiki.archlinux .org/index. php/Compiz_ Troubleshooting #Context_ menu_in_ applications_ .28firefox. 2C_.... 3F.29_disappear s_on_mouseover
But it doen't helped for me.