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Firefox process starts, but no window is displayed.

  • 1 reply
  • 110 have this problem
  • Last reply by sbartsch

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Suddenly Firefox will not start. The firefox.exe process is running fine, but no window is displayed. And no sign of it in the taskbar. There is no error-messages. I have tried to create a new profile, it did not help.

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.1; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

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When this happens, if IE8 is NOT open, it WON'T open until I kill the Firefox process.

The only solution I have found is to reboot my machine.

Vista Home AMD Triple Core Machine 3 Gig of Ram Avast Antivirus