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详细了解

A "File not found" window appears in the lower right hand corner of the screen with no way to delete it.

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Shortly after the home screen is opened the "File not found" window appears on the screen. Firefox appears to operate without other issues notwithstanding the missing file. I would like to delete the window but there is no delete selection for it.

Shortly after the home screen is opened the "File not found" window appears on the screen. Firefox appears to operate without other issues notwithstanding the missing file. I would like to delete the window but there is no delete selection for it.

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Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.


Further information can be found in the Troubleshoot Firefox issues caused by malware article.

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