Rackspace Cloud Files CDN. Why no far future expires headers

First test result after enabling Rackspace Files CDN and my cdn score went up to a B but my browser cache score went from A to F.

I can only set the max ttl to 72 hours on Rackspace. Is there any way for me to add the far future expires headers?

You can go beyond their 72 hour limit by using the API, sadly it’s not included with their control panel, Rackspace TTL should help you out, it’ll tell you how you can use your Rackspace Cloud server or any linux with SSH and CURL installed.

Hope it helps