in fact, ive got no idea why this may happen, except firefox being damaged in certain way (probably by using it too frequently, it simply wants to retire in honour), but obviously there are no system- or hardware-problems on your CPU (why should IE run that quickly if you had some...) and as it seems to be a firefox-problem i would recommend to deinstall and reinstall, maybe even an older version of firefox.
(hide) Tired of placing boats or Espionage pieces at the begining of the game? You can go to Game Editors and save some of your favourite positions for future use. (pauloaguia) (show all tips)