Instead, it's the creative solutions that developer Mihai Parparita has come up with to enable persistent storage, fast download speeds, reduced processor usage, and file transfers between the classic Mac and whatever host system you're running it on. What makes the project unique isn't necessarily that it's browser-based it has been possible to run old DOS, Windows, and Mac OS versions in browser windows for quite a while now. Further Reading My coworkers made me use Mac OS 9 for their (and your) amusement