The program wouldn't open because it was apparently still running in the background, so I restarted a few times which didn't help. Then I tried using the task manager to end the process but that didn't work either. Then opened the command prompt and used taskkill, then pskill (using the PID number) but neither worked. The problem wasn't with how I was using these commands as they could close any other program I had running, just not firefox.exe*32. Any ideas?