Re: Hacks.Mozilla.Org main css file does not load in Auroroa
I managed to access that stylesheet using View Dependencies. I opened it in a new tab. That is a useful extension that adds into Page Info.
I was also able to open it by copying that URL from your post and pasting it into the address bar and hitting Return.
I am not using Aurora, but FF 16.0.1, but I do not see why a test build would not be able to find a file that is obviously present online.