This problem with Firefox 18.104.22.168 locking up my entire 4.0 desktop is becoming quite annoying. I already tried to find a newer version in the ubuntu "proposed" repositories, but none is to be found. Does anybody know of a fix for this problem? Thanks
Update: This happened to me while using epiphany as well. I use an nvidia 7300LE video card but used Envy to install drivers instead of the restricted driver manager. I have reinstalled Mint and used the restricted driver manager to enable 3d drivers. I think this was the problem because my whole system would just lock up forcing a reboot. So far, all is well.