I understood there was a technical limitation here too - * apps can't write to a page and mark it executable * therefore you can't JIT compile JS * ther

I understood there was a technical limitation here too - * apps can't write to a page and mark it executable * therefore you can't JIT compile JS * therefore any alt-browsers will be slow as sin. Did I understand wrong? Or are they also going to loosen the sandbox to allow JIT compilation? That seems unwise.