Hello,

Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:

1. Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
2. Under "Time range to clear", select "Everything".
3. Now, click the arrow next to Details to toggle the Details list active.
4. From the details list, check Cache and Cookies and uncheck everything else.
5. Now click the Clear now button.

Further information can be found in the Clear your cache, history and other personal information in Firefox article.

Did this fix your problems? Please report back to us!

Thank you.

Try to update to Firefox 27.0 that has been released today via Help > About.

You can find the full version of the current Firefox 27.0 release in all languages and for all Operating Systems here:

• http://www.mozilla.org/en-US/firefox/all.html

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.

See:

• https://support.mozilla.org/kb/Server+not+found
• https://support.mozilla.org/kb/Firewalls

• https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

See also:

• http://kb.mozillazine.org/Error_loading_websites

You can try to reset (power off/on) the router.

Hi, thanks for replying. I updated to firefox 27 but it didn't do anything to resolve the issue. Clearing the cache/cookies didn't do anything either.

I should also add that I have the same problems in google chrome. The computer is secure and virus free, so I know that it's not some sort of malware causing the problem.

Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

See also:

• http://kb.mozillazine.org/Error_loading_websites

You can try to reset (power off/on) the router.