I'm having problem switching multiple windows from a same program.
For example, if I have 2 windows opened for Firefox at the same time and I wanted to switch from one another, it used to display a 2 small grid preview for each session when I click on the icon. However, that function doesn't seem to be working on my ubuntu 12.04 now. It doesn't response when I click on the Firefox (or other application) icon in the sidebar. Does anyone know how to fix this?
By the way, I know ALT+TAB can switch windows too, but it's hard to switch if I have 7 pdf documents opened at the same time. So I really wish to have this feature fixed.
Thanks in advance.