Try to follow the CSSWG format/rules a bit better.
Created attachment 651714 [details] [diff] [review]
Comment on attachment 651714 [details] [diff] [review]
r=dbaron, except I think it's probably better to move pass.html into a support/ subdirectory than to rename it.
One more tweak:
since I had to retract the tests with @-moz-document, I wanted @media equivalents for both (and we only had an @media equivalent for one).