crash in kernel when killing firefox.exe process

Install Firefox 12.0
Start Firefox application. Lag happens.
Open Task Manager and terminate firefox.exe process -> BSOD. r57528.
Tryed to regtest and there is what I got:
getting crash reporter only 56300
BSOD starting ff 56900
BSOD loading page 57200
BSOD loading page 57220
black screen 1st stage 57225
ros keeps restarting at boot menu 57227
BSOD 2nd stage when 'ReactOS is shutting down' 57228
2nd stage 'Registering components' then all windows are gone 57229
BSOD when killing process 57230
BSOD when killing process 57250