Proposal: use the 'immutable' setting for cache headers

[martijnvt1981]

I think it'd be wise to add a more aggressive cache header, which would be able to eliminate unnecessary lookups (200-code requests). Please take a look at this article

Long story short, if you're absolutely sure the files stay exactly the same and you don't need any extra lookups, it'd be better to use a header like this: public, max-age=31560000, immutable. The immutable property will make sure the browser doesn't reach out to the origin to see if something newer is available.

This will surely speed up loading times! Please consider adding this cache header setting to the advanced settings section of the 'Browser cache' area.

[cssjoe]

We can add another cache policy selection for "CSS & JS" and "Media and Other" in the Browser Cache settings. I wouldn't recommend the setting for "HTML & XML".