The window controls of the program (close, maximize, minimize and window-options buttons) are not visible because the window is too big on the screen and they are hidden behind the Ubuntu top menu bar and I can only interact with the firefox window by keyboard commands. It happens since the last firefox packet update.
It happens the same to me (Bug #360004: https:/ /bugs.launchpad .net/ubuntu/ +source/ firefox- 3.0/+bug/ a):
The window controls of the program (close, maximize, minimize and window-options buttons) are not visible because the window is too big on the screen and they are hidden behind the Ubuntu top menu bar and I can only interact with the firefox window by keyboard commands. It happens since the last firefox packet update.