A workaround:
Firefox menu > File > Quit Then execute in terminal: sudo killall -9 -r firefox sudo apt-get purge firefox firefox-3.0 ubufox sudo apt-get install --reinstall firefox firefox-3.0 firefox-3.0-gnome-support
When it's done, try run firefox
A workaround:
Firefox menu > File > Quit 3.0-gnome- support
Then execute in terminal:
sudo killall -9 -r firefox
sudo apt-get purge firefox firefox-3.0 ubufox
sudo apt-get install --reinstall firefox firefox-3.0 firefox-
When it's done, try run firefox