I recently installed Debian 8 on my desktop with the Gnome and I noticed that if I use the Firefox for long time, such as one or two hours, out of no where the secondary menu does not show anymore. It shows a black menu where I can not visualize the options.
The secondary menu that I mean, is for instance, the suggestions on the address bar of the Firefox while I write it. Also, on this moment, if I open any application, such as libre office writer, it open but it is black.
If I restart the section with an Alt+F2 and r it gets "Oh no! Something has gone wrong." and "A problem has occurred and the system can't recover. Please log out and try again."
I can't find something related on the web, have anyone saw something similar?
All the best,