Yeah. The developers at barbarian mentioned in a blog post that they started the project since they needed a browser with fullscreen support for mac to present slides. But I personally use this to browse things where I need concentration - like reading some serious stuff.
And there is a "Kiosk mode" which would prevent me from doing an alt+tab. To come out of kiosk mode I would have to type my password once. When the password prompt comes up I would ask myself once if I need to really go to some other app now, or if I should continue concentrating on reading this for more time. This process makes me concentrate longer on what I'm reading.
I actually use this on a daily basis and I must say it leaves something to be desired. It isn't stable and for whatever reason it'll often just drop external styling until reloaded.
"Al Gore invented the internet, that was pretty cool, thanks Al. Steve Jobs invented the Cinema Display, boy did he make my internet look good. The real question is, how the hell did I make it this long without browsing icanhascheezburger in full screen glory? Thanks Barbarians, this is how it should be. – Josh Spear, founding partner, Undercurrent"
This has to be ironic, but why in the world would they post it?
Pretty decent to use but may check out some of the other suggestions on here - bookmark organization leaves something to be desired, there's no auto complete of addresses, and given the keyboard centric navigation model, it would be nice to have keys to switch between windows vs. doing cmd-t then needing a mouse to choose a new window.