Hi i download FF 4 and at first it work nice until i go to amd.com page and FF crash becouse of problems with ati drivers( i have HD 4850 and drivers version 11.2 win 7 64bit). I tried to load the page secound time and then system crash to bluescreen and my pc restart. The ati drivers 11.x are not very good so i instal last known version that was stable 10.9 but the problem with ff crash and then bluescreen crash hapend again. If any one know what is going on or you have similar problems plz help.