First thing i did after installing was disable updates, i should be fine for a while. -Another thing that is becoming more difficult to do in FF.
That's a really dangerous thing to do for a piece of software that's made to run untrusted code on your system!
But since browser JavaScript engines are some of the best sandboxes in existence due to being constantly tested and updated, not using NoScript really isn't dangerous. Sure, disabling JS reduces the amount of risk, but that amount is already low enough to be tolerable for most people.