Option to use prerender where available?

Thanks for this awesome project! I noticed that it only downloads the HTML for the next page, which certainly helps, but it doesn't prefetch any sub-resources (e.g. scripts/styles on the next page). Might be cool to add an option to use `` where available (Chrome, IE, Edge) to support this with fallback to standard prefetch where not (Firefox, Safari)?

What do you think?