Hi @ all. First the PrevX integration into FF (sandboxed) works well. Then i tried FF (without sandbox), it works. After that i tried again FF (sanboxed) but there was no PrevX tab anymore?! And after reboot my sandboxed FF did not work! It tries to start up but then was closed again. So i could not open sandboxed webbrowser anymore. I did a system restore and every thing is back to normal now. Any ideas? PS: I now reinstalled the beta and tried sandboxed FF. No PrevX tab, no protection. Why did it worked well first and does not work now?