[ubuntu] Firefox crashes - host

Hi all,

Host Ubuntu 12.04 desktop 64bit
Oracle VirtualBox

Firefox crashes immediately after start. I have tried many time diable add-on on safe-mode. Also after deleting ~/.mozilla reinstall Firefox without result. I can start Firefox on safe-mode but it crashes immediate on browsing Internet.

This happened when I installed MSWindow8 guest. Removing it doesn't solving the crashing problem.

Please help.

TIA

B.R.
satimis