When I am watching streaming movies on Firefox 4.0.1 running on Ubuntu 11.04 (Ubuntu classic desktop), firefox is stuck/hung, and I am unable to close/kill it through GUI such as closing the window etc.
However, sometimes I could hear the dialogues of the movie, but the firefox is still hanging. Rebooting seems to be the only option in this situations. Therefore, I needed to go to console (through CTRL+ALT F1) and need to reboot the machine.
Please let me know a solution for this problem.