Comment 4 for bug 1194832

I'm getting a similar problem after upgrading to Firefox 22. (This is under Fedora, but this is the only mention I can find.)

Under my usual Firefox profile, all websites except Google ones time-out. This is not fixed by starting in safe mode, but is fixed by starting Firefox with a different profile.

Can't see any settings that could be causing this. Looks like I'll have to transfer over my extensions and customizations to a new profile.