Duplicate Instance Running Bug
After running portable firefox 1.5 for the first time and updating some extensions then restarting portable firefox, an alert pops up saying another instance of firefox is already running and prevents firefox from opening. I have checked running processes and firefox.exe is not listed and I have ejected my external hard drive and it still gives that alert.
Edit: The same alert of another firefox instance even exists on another pc where portable firefox has never been run on before.