Your crash report: Firefox 9.0.1 Crash Report [@ vlsp.dll@0x7a46 ] vlsp.dll is an external DLL (Venturi Layered Service Provider). Do you have Venturi firewall or V-ONE SmartPass software?

It was Fourelle Venturi installed by Motorola Motohelper! I have deinstalled Motohelper and deleted all entries of Fourelle in regedit. Then i have startet the Midrosoft RegClean an now firefox is working normal.

Thank you for the tip!

Thanks for the report, not a surprise. Some ISP or mobile providers offer applications to manage the internet connexion (firewall, optimization, data compression to reduce bandwidth etc) and in many cases, these applications are really bad coded and buggy with Internet applications like browsers or p2p clients.