I am using Internet Explorer and Firefox on Windows 7. I dual boot with Ubuntu, which has a fully-working copy of Firefox 3.86.
On the Windows partition, Internet Explorer works fine, but Firefox 4 will not load any pages. I have run Super Anti Spyware and Spybot S&D which found a few issues - but nothing major - so I think it may be an OS issue with the registry, or a problem with Firefox itself.
I am unsure why Firefox redirects to a "not connected" screen every time I try and load a page. I've also uninstalled and reinstalled Firefox 4, and am contemplating going back to 3.6.
Any thoughts on why Firefox 4 is not working properly for me?