In Firefox 3.6.4 and later the default connection settings have been changed to "Use the system proxy settings". See "Firefox connection settings" in Server Not Found - Troubleshoot connection problems

You can find the connection setting here: Tools > Options > Advanced : Network : Connection If you do not need to use a proxy to connect to internet then select No Proxy

Another possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that,. Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox. See Server Not Found - Troubleshoot connection problems and Configure firewalls so that Firefox can access the Internet and http://kb.mozillazine.org/Firewalls

It was the firewall that did it. Couldn't findany evidence of it preventing or having any rules for access to mozilla but restored the default settings and I am back on.

Thanks

I have the same problem. Neither of these solutions worked for me. I've also tried uninstalling and reinstalling. Firefox works fine from my laptop connected to the same wireless network.

We havr the same problem. Two other laptops in the house connectt with firefox just fine. "unable to connect" is the message. Windows Vista not sure which version, but we did reinstall firefox and it still doesn't connect

We have register new website of Weebly. http://www.lovemoneyclub.net Now I can not open completely .Every time it wii show as this pop-up by say

Oops! Weebly encountered an error. Please try your last request again. Kindly reply asap.

Hi there impath,

Instead of asking your question on this thread, please start a new thread so we can help you better.

Thank you!

• "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
• "Remove the Cookies" from sites that cause problems: Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

• Don't make any changes on the Safe mode start window.

See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

I'm still having trouble with this after trying the suggestions above...please help! I love my firefox.

icam108,

Please start your own thread and explain your problem completely, instead of posting in a thread that is marked Solved.
Click here - Ask a new question - to start a new thread.

A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox.
See Server Not Found - Troubleshoot connection problems and Configure firewalls so that Firefox can access the Internet and http://kb.mozillazine.org/Firewalls