Firefox crashes when using Yahoo Mail

This article is no longer maintained, so its content might be out of date.

This article describes why Firefox may close itself unexpectedly when using Yahoo!® Mail. For problems with Firefox crashing when not using Yahoo!® Mail, see Troubleshoot Firefox crashes (closing or quitting unexpectedly)

Note: This article applies to Windows only.

Yahoo!® Messenger

The Yahoo!® Application State plugin can cause crashes. You'll need to disable this plugin.

  1. Click the Firefox menu Fx89menuButton and select Exit.Click the Firefox menu at the top of the screen and select Quit Firefox.Click the Firefox menu Fx89menuButton and select Quit.
  2. Open My Computer or Windows Explorer.
  3. Browse to the directory: C:\Program Files\Yahoo!\shared
  4. Delete the file npYState.dll. Now that this plugin has been removed, Firefox may stop crashing when using Yahoo!® Mail.

Removing the plugin will not affect your ability to use Yahoo! Mail.

These fine people helped write this article:

Illustration of hands


Grow and share your expertise with others. Answer questions and improve our knowledge base.

Learn More