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I am trying to install Firefox but there is error like;

Failed to fetch
404  Not Found [IP: 80] E: Unable to fetch some archives,
maybe run apt-get update or try with --fix-missing?

Also I tried software center but it said also;

Failed to download package files Check your Internet connection.
Failed to fetch
404  Not Found [IP: 80]

What is the problem for this basic operation?

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maybe run sudo apt-get update or try with sudo apt-get update --fix-missing What happens? Edit the question to add information? – jm_____ Dec 26 '13 at 20:46
First I typed sudo apt-get update --fix-missing then I installed firefox and it works. Thank you. – Mr. White Dec 26 '13 at 20:55

There is no file there, so it's not gonna download obviously. Which version of Ubuntu do you have? Try running sudo apt-get update or download updates (see if they work, and from which server). If it doesn't work, download FF from

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