Last weekend a copy of Firefox 1.5 automatically upgraded itself on my Windows laptop. Upon restarting the application I was no longer able to view any websites. Any web address put in would seemingly resolve quickly but only render a blank white screen. If you view source, you would get the source of the blank page.
Removing Firefox and reinstalling did nothing to change this behaviour.
Removing my profile did nothing
Launching Firefox in Firefox (safe mode) seemed to work sometimes, but then stopped completely.
Mozilla and IE continued to work as expected
I read the Firefox 1.5.0.1 release notes today and saw a notice that some firewall products silently disable Firefox’s access to the network.
Sure enough, my local firewall had Firefox in all RED as a BLOCKED product. Click / Click and all was well in the world.
I moved my old profile back to its original location and all is right as rain.
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