Strange Firefox

I have successfully upgraded my Firefox on my desktop and workstation at my house and my office, but the strange thing is that i couldn't upgrade my Firefox on my laptop. I have tried to use Automatic Updates and Offline installation, but both failed. The upgrade process is working, as i saw the installation process, but when the browser is re-launched, it gives me nothing. Not a single window. But the strange thing is that the PID is active, meaning that there is a process running.

I have tried to run it on safe mode, removing .mozilla directory and many other solution i found on the Internet, but no luck. Running from terminal also gives me nothing. Not a single error message

Any ideas ??