Hi. I tried to invoke Firefox in Ubuntu 10.04. I got a dialog box entitled “Close Firefox”, which said:
“Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.”. I had not recently had Firefox running; so there was no instance of Firefox showing on the desktop display.
I have had this problem from time to time in the past; but just rebooted. Seems like there should be a better way. Any ideas as to:
1. How that unknown instance of Firefox got orphaned?, and
2. How to fix the problem without rebooting?