Why won’t FoxClocks remember my settings after I restart Firefox/Thunderbird?
This can mean Firefox/Thunderbird is crashing on exit or that there’s a ‘ghost’ Firefox/Thunderbird process after all windows are closed. Under Windows, you can use the ‘Processes’ tab of the Task Manager to check whether there’s a ghost firefox.exe/thunderbird.exe process still running after you’ve shut down your application. If there is, you can use the ‘End process’ button to kill it. Other OSes have similar procedures to deal with ghost processes.