This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox does not work

  • 1 reply
  • 1 has this problem
  • 10 views
  • Last reply by FredMcD

akrysler
akrysler
more options

I can't load any website. It says "Server not found". I have McAfee Host Intrusion Prevention Firewall installed on my computer. How do I fix this?

I can't load any website. It says "Server not found". I have McAfee Host Intrusion Prevention Firewall installed on my computer. How do I fix this?

All Replies (1)

FredMcD
FredMcD
more options

What is you computer system and Firefox?

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select Network. Look for Configure How Firefox Connects and press the Settings button. Check the settings.

Some problems occurs 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}