We can understand if you somehow don't feel ready to purchase a Firefox OS phone. After all, the platform is still very young and it's only available on a couple of devices that aren't even so widely available right now. But if you're still interested in checking the platform out, which wouldn't be a surprise, because new platforms don't come out every day, you can actually do so by installing the Firefox OS simulator, which is now accessible to everyone who wants to try it!
The finished simulator comes with a number of improvements over its beta predecessors such as a smaller download size, faster start-up, as well as bug-fixes. The best part is that installing it is incredibly simple - you just need to have Firefox (the desktop browser) installed, and then install the Firefox OS Simulator add-on, which can be found here