safari crashed pleas help

[technomacx]

When i was use my safari browser i install an unknown extension after that the safari crashed and a cant open it at all 
I try to uninstall it and reinstall but safari not working 
I try to fix disk permissions and to use clean my mac and onyX but nothing help
 

i Try going to the following path and deleting it:
 

Code:

~/Library/Safari/Extensions

nothing happened 

 

i got into safe mode and safari work     i use the "Reset Safari" option in the main Safari menu...

but when i restart my computer and got in the normal mode the safari dose not work

please help

[technomacx]

finally i decide to reinstall mountain lion and see what will happen 

finally after i reinstall the system safari work perfect