If you want to give super-secure, relatively anonymous computing a shot, then the operating system used by famed NSA leaker Edward Snowden might be for you.

The Amnesic Incognito Live System, otherwise known as Tails, has officially jumped out of beta and into version 1.0.

So, what does that actually mean? Security fixes, bug fixes, and general improvements to the OS, which are all detailed in the version 1.0 release notes for the operating system. The updates are nothing Earth-shattering, but the announcement is nevertheless an achievement for an anonymously created OS nearly five years in the making.

“Version 1.0 is often an important milestone that denotes the maturity of a free software project. The first public version of what would become Tails was released on June 23 2009, when it was called Amnesia. That was almost five years ago. Tails 1.0 marks the 36th stable release since then,” reads the release notes(Opens in a new window).

According to a recent article from Wired(Opens in a new window), Snowden is said to have used Tails in his communications with journalist Glenn Greenwald and documentary film maker Laura Poitras. The beauty of the USB-based operating system is that it’s completely plug-and-play: No traces of what one does during a session are saved on the computer used.

The Linux-based, open-source operating system — created by a team of developers who have kept their identities secret throughout its development — is designed to give normal people a considerable security arsenal sans hassle.

“At that time some of us were already Tor enthusiasts and had been involved in free software communities for years, but we felt that something was missing to the panorama: a toolbox that would bring all the essential privacy enhancing technologies together and made them ready to use and accessible to a larger public,” the developers told Wired.

Though Tails’s customized apps(Opens in a new window) offer a lot — including the anonymous Tor browser (with HTTPS Everywhere and Adblock Plus extensions built-in), encrypted email and chat clients, as well as file encryption for anything one saves to one’s USB drive — that’s not to say that the operating system is completely foolproof when it comes to user security and anonymity.

Tails lists a number of areas(Opens in a new window) that the operating system’s security can’t address, including one’s use of weak passwords for online sites, one’s susceptibility to man-in-the-middle attacks, and the fact that ISPs and servers will be able to detect that you’re using both Tor and likely Tails when browsing.

That’s not to mention the security holes that can affect previous iterations of the operating system (spoiler: stay upgraded!), in addition to any zero-day flaws that haven’t yet been patched up. In other words, Tails is designed to be super-secure, but not absolutely foolproof.