I recently got the Xpra client and GBA emulator, but I’m not really sure how they work. I tried to run a GBA game, but nothing happened so I think I’m doing something wrong. With the Xpra client, I’d like to run a browser similar to demonstration, but I have no idea how.
The GBA application was made by a community member, so I have no idea how that works myself. Haven’t even tried it before. So you gotta contact the author for more information about that.
As for Xpra, check out the official documentation on how to set up a server. The OS.js application just connects to the Xpra server you set up.
Note that the Xpra stuff is WIP.