I am creating another program to selectively copy files out of the Cache directory while Firefox is running. I have it almost ready to go, but I want the process to run in background without overt user intervention (after kickoff), so I need a way to monitor whether Firefox is still running or if it has exited (either due to a user request or some kind of error) so that this new process can exit on it's own. Is there a straightforward way to determine if the Firefox process is still active from another process.