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Firefox will not close properly at the end of a session.

Posted

Clicking the "X" close button or selecting "close window" from the system tray icon causes the window to close, but when I try to start a new session I get a window saying "Firefox is already running but not responding." I have to use the Task Manager to "end process" the program before I can start a new session. I reported this last week as an intermittent problem, but it has become constant, as in every time. This happened occasionally (once a month or so) in prior releases, but since the 5.0 release it has quickly gotten significantly worse, until now the only way I can close the program successfully is through the task manager.

Clicking the "X" close button or selecting "close window" from the system tray icon causes the window to close, but when I try to start a new session I get a window saying "Firefox is already running but not responding." I have to use the Task Manager to "end process" the program before I can start a new session. I reported this last week as an intermittent problem, but it has become constant, as in every time. This happened occasionally (once a month or so) in prior releases, but since the 5.0 release it has quickly gotten significantly worse, until now the only way I can close the program successfully is through the task manager.

Additional System Details

This happened

Every time Firefox opened

This started when...

Almost immediately after the 5.0 release

Installed Plug-ins

  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.0
  • Shockwave Flash 10.3 r181
  • Adobe Shockwave for Director Netscape plug-in, version 11.5
  • Next Generation Java Plug-in 1.6.0_26 for Mozilla browsers
  • 4.0.60531.0
  • Zeon PDF Plugin For Mozilla

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0

More Information

Unable to find any reference in the help files.

cor-el
  • Top 10 Contributor
  • Moderator
12528 solutions 115514 answers
See "Hang at exit": *http://kb.mozillazine.org/Firefox_hangs *https://support.mozilla.com/kb/Firefox+hangs