UI look on firefox os
Hi, I am developing an app for the firefox os and I noticed that the elements do not have the same flatness as in the docs. The flat ui works on the firefox  browser well.
![ratchet error](https://cloud.githubusercontent.com/assets/2037708/3942140/a6f63990-2556-11e4-82a0-a40217c226d0.PNG)
