If we have a rule like: > @media screen { div { color: white; } } Gecko (as well as Blink) serializes it as: > @media screen { > div { color: white; } > } while Stylo serializes it as > @media screen { div { color: white; } } Although the serialization is not speced anywhere at the moment, I think the way Gecko and Blink currently do makes sense, and we should change Stylo to do so as well. It causes failures in layout/style/test/chrome/test_chrome_only_media_queries.html when I tried to enable stylo on chrome by default.

(In reply to Xidorn Quan [:xidorn] UTC-8 (less responsive Nov 5 ~ Dec 16) from comment #0) > It causes failures in > layout/style/test/chrome/test_chrome_only_media_queries.html when I tried to > enable stylo on chrome by default. Whoops, that happens to me for writing tests the lazy way ;)