User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-TW; rv:1.8) Gecko/20051111 Firefox/1.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-TW; rv:1.8) Gecko/20051111 Firefox/1.5 I found that sometimes when I close the FireFox, it is not completely shutted down. After closing the program for a while, and I open it again, a pop up will come out and tell me that "There's another Firefox is running", so I can't open the program. I need to go to the Task manager to close the firefox.exe manually as a final. Reproducible: Sometimes Steps to Reproduce: 1. Close the firefox (Sorry, I can't get how to reproduce it.) Actual Results: The firefox.exe is still in the task manager. Expected Results: Completely shutted down.

*** This bug has been marked as a duplicate of 239223 ***