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I get a 404 error using Firefox "404 file or directory not found."

  • 2 replies
  • 1 has this problem
  • Last reply by joebliskey

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This happens when I try to open Firefox to browse

All Replies (2)

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Sounds like a problem with your homepage. Are you calling Firefox using a shortcut or directly? What is your chosen homepage?

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

If you still can't get The browser to open,

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

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I'm using a shortcut icon in the favorites bar at the bottom of my screen. Firefox is my default browser