Yet, it is a very not-really-good idea to run stuff on a web browser. Web browsers are a notoriously insecure, slow platform with controls (“Back”, “Reload”, …) which are not optimized to run applications.
edit: I did not expect that the “modern web” crowd would now come here to berate (and downvote) me for the sacrilege of not unconditionally considering web browsers to be the very best piece of software for every purpose. My fault, sorry. I’m out of here, this is pointless.