@stefan2007octavian Thanks for your reply. I had only one extension and that should not mess with it. I turned it off, restarted the step and got same error. I have done over 100 steps already in this ResponsiveWebDesign(beta) curriculum. This happens in latest Firefox.
Yes, that’s a big problem to FCC…
Because of that, it’s recommended to work on it on Chrome…
Without extensions, because they can affect tests…