Windows performed an automatic update. I am now unable to use Firefox. I receive an error message "Firefox can't establish a connection to the server". Windows IE works, Outlook works. What did Microsoft do to me this time?!!!
Windows performed an automatic update on my PC this morning. Now, Firefox does not work other than in SAFE mode. I get "Firefox can't establish a connection to the server..." I downloaded and reinstalled the latest version of Firefox and get the same error message. IE works. MS Outlook works. What did Windows do to me this time?
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I would not have expected a Windows update to cause such a problem, especially when Firefox works in Safe mode. Maybe it is just an unhappy coincidence.
Is any security software or firewall blocking Firefox (although I do not see why it would then allow firefox in safe mode).
Malware is always a suspect in such situations, with typical advice being: /questions/757994#answer-109685
- see also is my firefox problem a result of malware
- firefox cannot load websites but other programs can it is certainly worth checking proxy settings
- cannot connect after upgrading Firefox (mentions security settings links)
Actually, Firefox is not working in SAFE mode either.
It is probably more normal to get a connection failure of Firefox, that continues to not connect even in safe Mode. My suggestions remain as in my post above.
You can find the connection settings in Tools > Options > Advanced : Network : Connection
If you do not need to use a proxy to connect to internet then select "No Proxy" if the default "Use the system proxy settings" setting doesn't work.
See "Firefox connection settings":
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode
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