Probably needs an actual error message.
It is sometimes easier to diagnose such problems with e.g. wget or at the very least you would see whether you get an error at all from the command line using the same URL as gave a problem in Firefox.
Probably needs an actual error message.
It is sometimes easier to diagnose such problems with e.g. wget or at the very least you would see whether you get an error at all from the command line using the same URL as gave a problem in Firefox.