Firefox crashes when using Yahoo Mail

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This article describes why Firefox may close itself unexpectedly when using Yahoo!® Mail. For problems with Firefox crashing when not using Yahoo!® Mail, see Firefox crashes - Troubleshoot, prevent and get help fixing crashes

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 menu button New Fx Menu and then click ExitQuit Close 29 .

    Click the Firefox menu Fx57Menu , then click Exit. Click the Firefox menu at the top of the screen, then click Quit Firefox.Click the Firefox menu Fx57Menu , then click 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.

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