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I cannot access any websites using Firefox. For my own site I get "File Not Found". My Yahoo downloads as text. No problems with the IE or Chrome browsers

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  • Last reply by OneNetNut

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I cannot access any websites using Firefox. The pages either say "File not found" or in the case of Yahoo and Facebook they look like text files on the screen. No issues with my computer and this is not happening with my IE and Chrome browsers. Already removed and reinstalled Firefox and it did not resolve the issue

I cannot access any websites using Firefox. The pages either say "File not found" or in the case of Yahoo and Facebook they look like text files on the screen. No issues with my computer and this is not happening with my IE and Chrome browsers. Already removed and reinstalled Firefox and it did not resolve the issue

Chosen solution

You can also do a malware check with some malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware.
All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

See also:

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You have a lot of changes to your setting in the network.http section. These are listed in the More System Details list to the right of your question under "Question Details". Do you recall making those changes, or did you use some kind of browser speedup or tuning software that could have done it?

To test how Firefox runs "uncustomized" on your system, could you do a two-minute experiment?

Create a new Firefox profile

A new profile will have your system-installed plugins (e.g., Flash) and extensions (e.g., security suite toolbars), but no themes, other extensions, or other customizations. It also should have completely fresh settings databases and a fresh cache folder.

Exit Firefox and start up in the Profile Manager using Start > search box (or Run):

firefox.exe -P

Any time you want to switch profiles, exit Firefox and return to this dialog.

You'll click the Create Profile button. I recommend using the default location suggested (don't click the button to choose a different folder). Then start Firefox in the new profile you created.

Do sites work more normally?

When returning to the Profile Manager, you might be tempted to use the Delete Profile button. But... it's a bit too easy to accidentally delete your "real" profile, so I recommend resisting the temptation. If you do want to clean up later, I suggest making a backup of all your profiles first in case something were to go wrong.

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Chosen Solution

You can also do a malware check with some malware scanning programs on the Windows computer.
Please scan with all programs because each program detects different malware.
All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

See also:

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Thanks for all the feedback! I ran "My PC Cleaner" software and it removed a number of errors on my hard drive. After re-starting the machine I encountered no more issues withe Firefox. Seems like its actually moving faster now than before as well. Again appreciate the community feedback!