This happens when Firefox does not shut down properly or there is an issue accessing the default profile. In order to troubleshoot this on Windows 8.1, please consider the following instructions: http://mzl.la/1ApHClJIf

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Firefox düzgün kapatılmıyor bu gerçekleşir veya varsayılan profili erişen bir sorun vardır. Windows'da 8.1 Bu sorunu gidermek için, aşağıdaki yönergeleri göz önünde bulundurun lütfen: http://mzl.la/1ApHClJIf

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See also:

• https://support.mozilla.org/kb/how-run-firefox-when-your-profile-missing-or-inacc

This is usually caused by a problem with the profiles.ini file and the profile marked as Default=1 in this file is no longer present on the hard drive.

• Windows: %AppData%\Mozilla\Firefox\
  C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\
• Linux: ~/.mozilla/firefox/
• Mac: ~/Library/Application Support/Firefox/

You can use one of these to make Firefox create a new default profile or reuse an existing profile:

• Delete the profiles.ini file to force Firefox to create a new default profile
• Use the Profile Manager to create a new profile
  Use "Choose Folder" when you create a new profile to select the location of a lost profile and recover this profile

• http://kb.mozillazine.org/Profile_Manager
• https://support.mozilla.org/kb/Managing+profiles
• http://kb.mozillazine.org/Profile_folder_-_Firefox