Firefox does not connect to any Web site, but other browsers will.

When I get something in the URL- google.com, localhost, http://127.0.0.1/ one bar the IP address, there is a fraction of a second flash, then the bar becomes empty and nothing has changed. It seems that Firefox is not even try to connect to the internet.

Yesterday, everything was fine when I was running FF on Windows 7. After the upgrade to Windows Pro 8, Firefox has failed. I've updated for Windows 8.1, hoping for the best, but it's the same problem.

I've walked by the firewall program, several times (the only race is the built-in Windows Firewall). Finally, I uninstalled Firefox, including all my settings, custom and reinstalled from scratch, twice. And even this version pure and clean Firefox does not connect to the internet.

I am a computer web developer and would be happy to look at the log files or run a tool (Fiddler?) to see what happens at a low level, if I only knew where to look.

john99, thanks for the links. I went through all (again), one by one. The last link kb.mozillazine.org/Standard_diagnostic showed me what helped. I've renamed "firefox.exe" to "firefox1.exe" and was able to use firefox.

It made me suspect the firewall or malicious software. I ran a Malwarebytes full scan, zero problems detected. I have pored on the entries of windows firewall, the "Windows Firewall with advanced security" view and also the simple control panel view. The only mention of Firefox is that I continue to add and remove to allow firefox through.

Here I knew what was going on, but for now, I can at least use firefox. How frustrating!

Tags: Firefox

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