I checked out the provided link. The OS does look interesting. However only the "starter" edition is available for free download. The other editions that are available for download to "commercial, pro and elite members" only.Last week, I've found out that Fortress Linux has released a secure Linux OS that is called the "Secure Browsing Edition". It only includes a hardened web browser.
This browser has a smart protection system against evil scripts and cookies. And it seems to be the only browser that forces TLS 1.2/SSL 3.3 encryption, while all the available web browsers in my Puppy install only use TLS 1.0, which was cracked recently. (Google for TLS cracked). Besides, I don't trust Puppy anymore after my system was infected by a root-kit last week.
I now use the Fortress Linux secure browsing edition to do my online banking and more. It's fast and it has an "Apple" look window manager. It boots in a matter of seconds.
The URL of their website is:
http://www.fortresslinux.org
Looks like a product advertisement to me.