It doesn't work too well on non-US keyboards. For instance I can't type @ (Alt-gr/Right-alt 2), $ (Alt-gr 4) or any of the following: {[]} (alt-gr 7-0). Welcome to Norwegian keyboard layout btw.

I'm guessing it might the browser blocking what it assumes is control keys, but it might also be the app not looking for those specific modifier-key combinations.

Looking at the wikipedia-page for keyboard layouts, it seems Norway is not alone when it comes to requiring modifier-keys to be able to type standard "programming" characters:

http://en.wikipedia.org/wiki/Keyboard_layout#Norwegian

If these things can't be done in browser, I'm guessing all those awesome, envisioned browser & cloud IDEs wont be that big a hit outside english-speaking countries.