While working on Contacts app to use gaia-header's attributes "title-start/end", and "no-font-fit" to cut down the work, I found the app still starts layout very late after all the CSS are loaded. But look at the CSSs, not every one is needed to paint the first page. We should be able to defer some to render the app earlier. And I believe this applies to all the apps. [1] https://github.com/filamentgroup/loadCSS

Should the NGA split into views help here? Each view should have its own css so the root view css should be much smaller.

Good point. Yes, that'd help.

Firefox OS is not being worked on