So I've been out of the loop with jailbreaking for some time now as the process of upgrading/reinstalling jailbreak apps always seems like a bit of a pain. Right now I've got an iPhone 5S that's jailbroken on iOS 7.0.4. Is it even possible for me to upgrade to a jailbroken iOS 9.0? And how would I go about that? Sorry if this is something that's been covered elsewhere, although I take it most other people have moved on from 7.0 by now..